妮裳馬戲團 (專輯) (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "妮裳馬戲團 (專輯)" in Chinese language version.

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162web.archive.org

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15mtv.com

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2m-online.ru

Россия Top 25: Андрей Бандера – Не любить невозможно (неделя 07-2009). 2M. 2009-02-18 [2016-08-30]. （原始内容存档于2009-02-24）（俄语）.

acharts.us

Britney Spears - Circus. aCharts. [2013-04-17]. （原始内容存档于2011-01-15）.

allmusic.com

Circus – Britney Spears. AllMusic. December 2, 2008 [October 13, 2017]. （原始内容存档于2017年10月13日）.
Stephen Thomas Erlewine. Circus: Britney Spears. AllMusic. Rovi Corporation. [2013-11-28]. （原始内容存档于2013-11-25）.
Britney Spears - US and Canandian Chart History. Allmusic. Rovi Corporation. [2013-04-07]. （原始内容存档于2012-02-25）.
Circus - Britney Spears: Credits. AllMusic. Rovi Corporation. [2013-11-28]. （原始内容存档于2017-08-12）.

amazon.co.uk

Circus: Britney Spears: Amazon.co.uk: MP3 Downloads. Amazon.co.uk. 2008-11-28 [2017-10-13]. （原始内容存档于2017-10-14）.

amazon.com

Amazon.com: Circus (Deluxe Version): Britney Spears: MP3 Downloads. Amazon Music. 2008-12-02 [2017-10-13]. （原始内容存档于2017-02-02）.
Britney Spears – Circus – Amazon.com Music. Amazon Music. 2008-12-02 [2017-10-13]. （原始内容存档于2016-05-09）.

amazon.de

Circus – Britney Spears: Amazon.de: Musik. Amazon.de. 2008-11-28 [2017-10-13]. （原始内容存档于2017-10-13）.
Circus – Deluxe Edition mit Bonus-DVD — incl. Poster – Britney Spears: Amazon.de: Musik. [2017-12-12]. （原始内容存档于2017-12-28）.

amprofon.com.mx

Certificaciones. Asociación Mexicana de Productores de Fonogramas y Videogramas. [2013-04-17] （西班牙语）. Type Britney Spears in the box under the ARTISTA column heading and Circus in the box under TÍTULO
Los Más Vendidos 2008 (PDF). Asociación Mexicana de Productores de Fonogramas y Videogramas. [2010-03-11]. （原始内容存档 (PDF)于2010-02-15）（西班牙语）.
Los Más Vendidos 2009 (PDF). Asociación Mexicana de Productores de Fonogramas y Videogramas. [2010-03-11]. （原始内容存档 (PDF)于2010-02-15）（西班牙语）.
Certificaciones AMPROFON. Asociación Mexicana de Productores de Fonogramas y Videogramas. 2008-12-09 [2018-03-17]. （原始内容存档于2018-03-17）（西班牙语）. 在「Filter」欄位輸入「Circus」。

anydecentmusic.com

Circus by Britney Spears reviews. AnyDecentMusic?. [2016-12-25]. （原始内容存档于2016-12-26）.

apple.com

itunes.apple.com

iTunes - Música - Circus de Britney Spears. iTunes Store (MX). Apple Inc. November 28, 2008 [July 14, 2013]. （原始内容存档于2014年2月28日）.
iTunes - Music - Circus (Deluxe Version) by Britney Spears. iTunes Store (IE). Apple Inc. November 28, 2008 [November 28, 2013]. （原始内容存档于2014年2月28日）.
Circus von Britney Spears in iTunes. iTunes Store (DE). Apple Inc. 2008-11-28 [2017-10-13]. （原始内容存档于2017-10-04）（德语）.
Circus by Britney Spears on iTunes. iTunes Store (GB). Apple Inc. 2008-11-28 [2017-10-13]. （原始内容存档于2017-10-14）.
Circus by Britney Spears on iTunes. iTunes Store (US). Apple Inc. 2008-11-28 [2017-10-13]. （原始内容存档于2017-10-14）.
ブリトニー・スピアーズ「Circus」を iTunes で. iTunes Store (JP). Apple Inc. 2008-11-28 [2017-10-13]. （原始内容存档于2017-10-14）（日语）.

archive.today

Rudy K. Review: Britney Spears - Circus. Sputnikmusic. 2009-11-26 [2018-05-16]. （原始内容存档于2013-01-04）.
ARIA Charts – Accreditations – 2009 Albums (PDF). Australian Recording Industry Association. [2021-10-22]. （原始内容存档 (PDF)于2021-10-22）（英语）.
Canadian single certifications – Britney Spears – Circus. Music Canada. 2023-10-18 [2024-02-14]. （原始内容存档于2024-02-14）（英语）.
Le cifre degli album più venduti nel 2008. Musica e dischi. [2012-09-06]. （原始内容存档于2012-09-06）（意大利语）.
Обновления сертификаций в России и СНГ. National Federation of Phonograph Producers. 2018-06-22 [2021-08-07]. （原始内容存档于2021-08-07）（俄语）.

aria.com.au

ARIA Charts – End Of Year Charts – Top 100 Albums 2008. Australian Recording Industry Association. [2009-03-22]. （原始内容存档于2016-02-29）.
ARIA Charts – End Of Year Charts – Top 50 Dance Albums 2008. Australian Recording Industry Association. [2016-12-22]. （原始内容存档于2012-03-20）.
ARIA Charts – End Of Year Charts – Top 100 Albums 2009. Australian Recording Industry Association. [2010-10-17]. （原始内容存档于2014-04-01）.
ARIA Charts – End Of Year Charts – Top 50 Dance Albums 2009. Australian Recording Industry Association. [2016-12-22]. （原始内容存档于2013-04-10）.

australian-charts.com

"Britney Spears – Circus". Australiancharts.com. Hung Medien. [2013-11-28].

austriancharts.at

"Britney Spears - Circus" (in German). Austriancharts.at. Hung Medien. [2013-11-28].
Jahreshitparade Alben 2009. austriancharts.at. Hung Medien. [2016-12-22]. （原始内容存档于2016-01-22）（德语）.

avclub.com

Genevieve Koski. Britney Spears: Circus. The A.V. Club. The Onion. 2008-12-08 [2013-11-28]. （原始内容存档于2013-12-03）.

bbc.co.uk

news.bbc.co.uk

Spears wants child-friendly home. BBC News. BBC. 2008-07-01 [2008-07-02]. （原始内容存档于2008-07-20）.
Take That set to spar with Spears. BBC News. BBC. 2008-10-14 [2013-04-07]. （原始内容存档于2010-11-19）.
Britney joins Madonna on US stage. BBC News. BBC. 2008-11-07 [2008-11-07]. （原始内容存档于2008-11-08）.

billboard-japan.com

ブリトニー・スピアーズデビュー10周年記念、全ヒット・シングルを完全網羅する最強ベスト盤11月25日に全世界同時緊急発売が決定！. Billboard Japan. 2009-09-24 [2019-07-10]. （原始内容存档于2019-07-10）（日语）.

billboard.biz

Year End Charts – European Top 100 Albums. Billboard. 2009 [2016-12-22]. （原始内容存档于2012-10-03）.

billboard.com

Britney Spending Summer In The Studio. Billboard. Prometheus Global Media. 2008-07-17 [2011-08-07]. （原始内容存档于2013-04-14）.
Spears Scores Record-Setting Hot 100 Jump. Billboard. Prometheus Global Media. 2012-11-12 [2013-03-02]. （原始内容存档于2012-11-10）.
Gary Trust. Best Of 2009: Part 1. Billboard (Prometheus Global Media). 2009-12-15 [2013-03-03]. （原始内容存档于2013-03-03）.
Katie Hasty. Britney's 'Circus' Debuts Atop Album Chart. Billboard (Prometheus Global Media). 2008-12-10 [2010-01-04]. （原始内容存档于2013-05-18）.
Britney Spears - Chart history. Billboard. Prometheus Global Media. [2013-03-03]. （原始内容存档于2015-07-09）.
Britney Spears – Radar charts. Billboard. Prometheus Global Media. [2013-03-02]. （原始内容存档于2012-11-07）.
Hasty, Katie. Britney's 'Circus' Debuts Atop Album Chart. Billboard. 2008-12-10 [2015-07-16]. （原始内容存档于2013-05-18）.
Trust, Gary. Ask Billboard: Britney Spears's Career Sales. Billboard. Prometheus Global Media. 2015-03-24 [2015-03-24]. （原始内容存档于2015-03-27）.
"Britney Spears Chart History (Canadian Albums)". Billboard. Retrieved 2013-11-28.
Sexton, Paul. Britney Scores Euro Chart Double. Billboard. 2008-12-11 [2016-12-22]. （原始内容存档于2016-10-01）.
"Britney Spears排行榜历史（Billboard 200）". Billboard. Retrieved 2013-11-28.
Billboard 200 Albums – Year-End 2009. Billboard. [2016-12-22]. （原始内容存档于2015-02-28）.

bpi.co.uk

British single certifications – Britney Spears – Circus. British Phonographic Industry. 2009-01-09 [2021-12-13]. （原始内容存档于2021-12-13）（英语）.

britney.com

Mobile. Britney.com. [2011-08-07]. （原始内容存档于2011-03-16）.
Britney.com Global Fan Fiction Contest. Britney.com. [2018-05-25]. （原始内容存档于2011-07-25）.
World Premiere: "Kill The Lights" Animated Video. Britney.com. [2009-12-31]. （原始内容存档于2009-07-30）.

britneyspears.com

store.britneyspears.com

Circus. store.britneyspears.com. [2018-05-25]. （原始内容存档于2016-08-09）.

canoe.ca

jam.canoe.ca

Lighter, brighter Circus. Canoe. 2008-12-02 [2008-12-02]. （原始内容存档于2013-10-02）.
John Williams. Britney returns to No. 1. Canoe Jam!. 2008-12-10 [2009-06-20]. （原始内容存档于2009-09-08）.

capif.org.ar

Circus Oro Argentina. CAPIF. [2017-12-12]. （原始内容存档于2009-09-09）（西班牙语）.

chart-track.co.uk

"GFK Chart-Track". Chart-Track.co.uk. GFK Chart-Track. IRMA. [2016-12-22].

charts.nz

"Charts.nz – Britney Spears – Circus". Hung Medien. Retrieved 2013-11-28.

chartsinfrance.net

Tops : Britney déçoit, Quentin surprend. Charts in France. 2008-12-02 [2008-12-05]. （原始内容存档于2008-12-05）.

dailystar.co.uk

Kim Dawson. Cruz pens Brit songs. Daily Star. Northern & Shell. 2008-07-03 [2008-07-27]. （原始内容存档于2013-12-07）.

dailytelegraph.com.au

Britney Spears to perform live at Bambi Awards, Germany. The Pantagraph（英语：The Pantagraph） (Lee Enterprises). 2008-11-26 [2013-04-07]. （原始内容存档于2011-08-11）.

danishcharts.dk

"Danishcharts.dk – Britney Spears – Circus". Hung Medien. Retrieved 2013-11-28.

digitalspy.co.uk

Nick Levine. E Notes on the new Britney album. Digital Spy. Hearst Corporation. 2008-11-10 [2013-04-07]. （原始内容存档于2012-10-24）.
Nick Levine. Notes on the new Britney album - Music The Sound. Digital Spy. Hearst Corporation. 2008-11-10 [2011-08-07]. （原始内容存档于2012-10-24）.
'X Factor' hits 12.8m ratings high. Digital Spy. Hearst Corporation. 2008-11-30 [2013-04-07]. （原始内容存档于2012-10-10）.
Nick Levine. Notes on the new Britney album. Digital Spy. Hearst Corporation. 2008-11-10 [2013-11-28]. （原始内容存档于2012-10-24）.

digitalspy.com

Nick Levine. Britney Spears – Radar review. Digital Spy. Hearst Corporation. 2009-06-27 [2009-11-24].

docdroid.net

Обновления сертификаций в России и СНГ. National Federation of Phonograph Producers. 2018-06-22 [2021-08-07]. （原始内容存档于2021-08-07）（俄语）.

dropbox.com

ARIA Charts – Accreditations – 2009 Albums (PDF). Australian Recording Industry Association. [2021-10-22]. （原始内容存档 (PDF)于2021-10-22）（英语）.

dutchcharts.nl

"Britney Spears – Circus" (in Dutch). Dutchcharts.nl. Hung Medien. [2013-11-28].

ew.com

Chris Willman. Circus Review. Entertainment Weekly. Time Inc. 2008-11-29 [2013-11-28]. （原始内容存档于2012-01-12）.
Chris Willman. Circus Review. Entertainment Weekly (Time Inc.). 2008-11-29 [2011-08-07]. （原始内容存档于2012-01-12）.

hollywoodinsider.ew.com

Shirley Halperin. Confirmed: Britney Spears working on new album. Entertainment Weekly. Time Inc. 2008-07-16 [2013-04-07]. （原始内容存档于2008-08-28）.

fernandogaribay.com

Works. F2 Inc. [2008-07-29]. （原始内容存档于2008-06-23）.

hdu-toplista.com

TOP KOMBINIRANIH - TJEDAN 49. 2008.. Hrvatska diskografska udruga. 2008-12-11 [2013-11-28]. （原始内容存档于2017-08-11）.

heraldsun.com.au

Britney Spears Wows Japan TV fans With Womanizer Show. Herald Sun（英语：Herald Sun） (News Corporation). 2008-12-17 [2013-04-07]. （原始内容存档于2011-08-09）.

hitlisterne.dk

Album 2008 Top-100. Hitlisten.NU. [2014-01-06]. （原始内容存档于2011-07-19）（丹麦语）.
Album 2009 Top-100. Hitlisten.NU. [2011-10-12]. （原始内容存档于2010-09-26）（丹麦语）.

hitquarters.com

A&R, Record Label / Company, Music Publishing, Artist Manager and Music Industry Directory. Hit Quarters. [2011-08-07]. （原始内容存档于2010-11-19）.
A&R, Record Label / Company, Music Publishing, Artist Manager and Music Industry Directory. Hit Quarters. [2011-08-07]. （原始内容存档于2010-11-19）.
Interview with Nicole Morier. HitQuarters. 2010-08-23 [2010-08-24]. （原始内容存档于2012-03-14）.

hmv.co.jp

Circus : Britney Spears. HMV. 2008-12-03 [2017-10-13]. （原始内容存档于2017-10-14）.

hollyscoop.com

Ani Esmailian. 15 Most Profitable Female Tours Ever. Stereotude. 2010-05-21 [2013-03-03]. （原始内容存档于2012-03-21）.

huffingtonpost.com

Jocelyn Vena. Britney Spears' Dad Gets Permanent Conservatorship. The Huffington Post. AOL. 2008-10-29 [2013-01-18]. （原始内容存档于2012-09-03）.

ifpi.dk

Guld Og Platin I August. IFPI Denmark. [2015-01-17]. （原始内容存档于2015-01-17）（丹麦语）.

ifpi.fi

"Britney Spears: Circus" (in Finnish). Musiikkituottajat. Retrieved 2013-11-28.

ifpi.gr

Top 50 Ελληνικών και Ξένων Aλμπουμ – Εβδομάδα 2/2009 [Top 50 Greek and Foreign Albums – Week 2/2009]. IFPI Greece. [2016-12-22]. （原始内容存档于2009-02-01）（希腊语）.
Annual Charts – Year 2008: Top 50 Ξένων Aλμπουμ [Annual Charts – Year 2008: Top 50 Foreign Albums]. IFPI Greece. [2013-03-03]. （原始内容存档于2012-02-10）（希腊语）.
Top 50 Ξένων Aλμπουμ Εβδομάδα 10/2009. IFPI Greece. [2009-03-26]. （原始内容存档于2009-03-26）（希腊语）.

ifpi.org

Top 50 Global Best Selling Albums for 2008 (PDF). International Federation of the Phonographic Industry. [2011-08-07]. （原始内容存档 (PDF)于2009-02-18）.
IFPI Middle East Awards - 2009. IFPI Middle East. [2013-08-07]. （原始内容存档于2013-08-07）（英语）.

ifpicr.cz

"Top 50 Prodejní". Czech Albums. ČNS IFPI. Note: On the chart page, select 200850 on the field besides the word "Zobrazit", and then click over the word to retrieve the correct chart data. [2016-12-22].

independent.co.uk

Album: Britney Spears, Circus (Zomba/Sony). The Independent. 2008-11-28 [2009-09-06]. （原始内容存档于2012-11-05）.
Album: Britney Spears, Circus (Zomba/Sony). The Independent (Independent Print). 2008-11-28 [2013-11-28]. （原始内容存档于2012-11-05）.

irishcharts.ie

2008 Certification Awards Platinum. Irish Recorded Music Association. [2013-11-02]. （原始内容存档于2013-11-02）（英语）.

italiancharts.com

"Britney Spears – Circus". Italiancharts.com. Hung Medien. [2013-11-28].

junoawards.ca

Artist Summary - The JUNO Awards. junoawards.ca. [2018-05-25]. （原始内容存档于2015-01-23）.

latimes.com

latimesblogs.latimes.com

Ann Powers. Album review: Britney Spears' 'Circus'. Los Angeles Times (Tribune Company（英语：Tribune Company）). 2008-12-06 [2008-12-30]. （原始内容存档于2010-08-09）.
Ann Powers. Album review: Britney Spears' 'Circus'. Los Angeles Times (Tribune Company). 2008-11-30 [2013-11-28]. （原始内容存档于2010-08-09）.

lescharts.com

"Britney Spears – Circus". Lescharts.com. Hung Medien. [2013-11-28].

mahasz.hu

"Archívum – Slágerlisták – MAHASZ – Magyar Hangfelvétel-kiadók Szövetsége". Mahasz.hu. LightMedia. [2016-12-22].

metacritic.com

Circus by Britney Spears. [2018-05-25]. （原始内容存档于2012-08-30）.
Circus Reviews. Metacritic. CBS Interactive. [2013-11-28]. （原始内容存档于2014-03-29）.

mexicancharts.com

Britney Spears – Blackout. mexicancharts.com. Hung Medien. [2013-11-28]. （原始内容存档于2012-10-19）.

mirror.co.uk

Sarah Tetteh, Sarah. Britney Spears exclusive pictures: Singer prepares raunchy routine for X Factor. Daily Mirror (Trinity Mirror（英语：Trinity Mirror）). 2008-10-22 [2013-03-03]. （原始内容存档于2008-12-18）.

mtv.com

Jocelyn Vena. Britney Spears Explains Why Circus Is 'Lighter' And Less Edgy Than Blackout. MTV News. Viacom. 2008-11-20 [2011-08-07]. （原始内容存档于2015-07-26）.
Gil Kaufman. Britney Spears Says New Album Is Her 'Best Work Ever,' Describes Shock Of Jamie Lynn's Pregnancy. MTV News（英语：MTV News）. Viacom. 2008-08-13 [2011-08-07]. （原始内容存档于2015-06-27）.
Jennfier Vineyard. Britney Spears' New Album, Circus, Slated For December 2 Release. MTV News. Viacom. 2008-09-15 [2011-08-07]. （原始内容存档于2015-08-01）.
Jennifer Vineyard. Britney Spears' collaborators talk about new album. MTV News. Viacom. 2008-09-11 [2013-04-07]. （原始内容存档于2008-09-12）.
Britney Spears' 'If U Seek Amy' Poses Censorship Problems For Radio. MTV News. Viacom. 2009-01-12 [2013-01-18]. （原始内容存档于2014-05-21）.
Gil Kaufman. Britney Spears' Circus Now Available For Streaming On Imeem. MTV News. Viacom. 2008-11-25 [2011-08-08]. （原始内容存档于2016-05-14）.
Jocelyn Vena. Britney Spears Gives Fans A Taste Of Circus With Online Preview. MTV News. Viacom. 2008-12-13 [2013-04-07]. （原始内容存档于2012-11-07）.
Jocelyn Vena. Britney Spears Documentary To Air November 30. MTV News. Viacom. 2008-10-09 [2013-04-07]. （原始内容存档于2012-10-24）.
Jocelyn Vena. Britney Spears Wows Fans, Family With 'Good Morning America' Birthday Performance. MTV News. Viacom. 2008-12-02 [2013-04-07]. （原始内容存档于2012-11-03）.
Gil Kaufman. Britney Spears Adds Circus Tour Dates Thanks To Strong Sales. MTV News. Viacom. 2008-12-10 [2013-04-07]. （原始内容存档于2012-11-05）.
Jocelyn Vena. Britney Spears' Manager Calls Circus Tour A 'Pop Extravaganza'. MTV News. Viacom. 2009-03-03 [2013-04-07]. （原始内容存档于2012-11-05）.
Gil Kaufman. Britney Spears To Kick Off Circus Tour In March. MTV News. Viacom. 2008-12-02 [2011-08-07]. （原始内容存档于2014-08-19）.
Jocelyn Vena. Britney Spears' 'Womanizer' Director Joseph Kahn Talks 'Toxic' Comparisons. MTV News. Viacom. 2008-10-17 [2013-04-07]. （原始内容存档于2012-11-07）.
James Montgomery. Britney Spears' 'Circus' Video - Check It Out Here!. MTV News. Viacom. 2008-12-05 [2013-04-07]. （原始内容存档于2012-11-03）.
Jocelyn Vena. Britney Spears' New 'Radar' Video Leaks. MTV News. Viacom. 2009-07-01 [2013-04-07]. （原始内容存档于2012-11-03）.

musicaedischi.it

Le cifre degli album più venduti nel 2008. Musica e dischi. [2012-09-06]. （原始内容存档于2012-09-06）（意大利语）.

musiccanada.com

Canadian album certifications – Britney Spears – Circus. Music Canada. [2013-04-17].
Canadian single certifications – Britney Spears – Circus. Music Canada. 2023-10-18 [2024-02-14]. （原始内容存档于2024-02-14）（英语）.

musicline.de

"Longplay-Chartverfolgung at Musicline" (in German). Musicline.de. Media Control. [2016-12-22].

musicload.de

存档副本. [2014-06-29]. （原始内容存档于2015-04-02）.

musikindustrie.de

Gold-/Platin-Datenbank (Britney Spears; 'Circus'). Bundesverband Musikindustrie. [2023-11-02]. （原始内容存档于2023-11-02）（德语）.

musikislife.net

Nominados Premios Oye! 2009. Blog Telenovelas. [2018-05-25]. （原始内容存档于2011-03-19）.

muumuse.com

Britney Spears: Circus (Album Review) - MuMuuse. MuuMuse（英语：MuuMuse）. 2008-11-17 [2013-09-24]. （原始内容存档于2013-10-03）.

nme.com

Circus Review. NME. 2008-11-28 [2009-09-06]. （原始内容存档于2009-01-22）.
Hamish MacBain. NME Album Reviews – Britney Spears. NME. Time Inc. 2008-11-28 [2013-04-17]. （原始内容存档于2013-03-13）.

norwegiancharts.com

"Britney Spears – Circus". Norwegiancharts.com. Hung Medien. [2013-11-28].

nydailynews.com

Joe Piazza. Britney Spears Makes TV Comeback On 'Good Morning America'. Daily News (Mortimer Zuckerman). 2008-12-02 [2013-04-07]. （原始内容存档于2012-10-21）.
David Hinckley. Z100 needs Britney Spears to clean up. Daily News (Mortimer Zuckerman（英语：Mortimer Zuckerman）). 2009-01-23 [2013-04-07]. （原始内容存档于2012-10-25）.

nytimes.com

Jon Pareles. Critics' Choice - New CDs From - Britney Spears, Akon, Cynic and John Escreet. The New York Times (The New York Times Company). 2008-11-30 [2013-11-28]. （原始内容存档于2013-12-20）.

ocregister.com

Wener, Ben. A better Britney doesn't make for a better Britney album: Soundcheck blog: Orange County Register. The Orange County Register（英语：The Orange County Register）. 2013-12-04 [2011-01-30]. （原始内容存档于2013-09-26）.

officialcharts.com

"Official Scottish Albums Chart Top 100". Official Charts Company. Retrieved 2016-12-22.
"Britney Spears | Artist | Official Charts". Official Charts Company. [2013-11-28].
End of Year Album Chart Top 100 – 2008. Official Charts Company. [2016-12-22]. （原始内容存档于2015-07-12）.

okmagazine.com

World Exclusive: Britney Reveals All!. OK!. Northern & Shell. 2008-08-12 [2013-03-02]. （原始内容存档于2009-07-17）.

onyx.pl

olis.onyx.pl

"Oficjalna lista sprzedaży :: OLIS - Official Retail Sales Chart". OLiS. Polish Society of the Phonographic Industry. [2016-12-22].

oricon.co.jp

検索結果-Oricon Style アーティスト/CD検索. Oricon. [2011-08-07]. （原始内容存档于2011-06-04）.
サーカス | ブリトニー・スピアーズ [Circus | Britney Spears]. Oricon. [2016-12-22]. （原始内容存档于2016-12-22）（日语）.
オリコン年間 CDアルバムランキング 2009年度 [Oricon Annual CD Album Ranking 2009]. Oricon. [2016-12-22]. （原始内容存档于2016-12-22）（日语）.

people.com

Natasha Stoynoff. Britney Spears Working and 'Having Fun' on New Album. People. Time Inc. 2008-07-16 [2011-08-07]. （原始内容存档于2011-05-21）.
Marisa Laudadio. Producer: Britney Is 'Really Shaping Up'. People. Time Inc. 2008-05-21 [2011-08-07]. （原始内容存档于2011-09-12）.
Britney Spears Calls New Song 'A Girl Anthem'. People. Time Inc. 2008-09-29 [2008-10-18]. （原始内容存档于2008-10-30）.
Stephen M. Silverman. Britney to Release New Album on Her Birthday. People. Time Inc. 2008-09-15 [2011-08-08]. （原始内容存档于2011-03-29）.

pollstar.com

Joe Reinartz. The Pollstar Top 50. Pollstar（英语：Pollstar）. 2009-12-30 [2013-04-07]. （原始内容存档于2012-03-22）.

pollstarpro.com

2009 Year End Top 50 Worldwide Concert Tours (PDF). Pollstar. 2010 [2010-02-08]. （原始内容 (PDF)存档于2016-09-09）.

popjustice.com

It's some Britney bits. PopJustice. 2008-11-11 [2013-03-02]. （原始内容存档于2008-12-19）.

portalpopline.com.br

"Circus" de Britney Spears já vendeu mais de 1 milhão nos E.U.A. POPline. 2009-01-30 [2015-07-14]. （原始内容存档于2015-07-14）（葡萄牙语）.

portuguesecharts.com

"Britney Spears – Circus". Portuguesecharts.com. Hung Medien. [2013-11-28].

radioscope.net.nz

Latest Gold / Platinum Albums. RIANZ. [2011-07-24]. （原始内容存档于2011-07-24）（英语）.

reuters.com

The Nielsen Company 2008 Canadian Music Industry Report. Reuters. Thomson Reuters. 2009-01-07 [2013-04-07]. （原始内容存档于2012-11-14）.

riaa.com

American album certifications – Britney Spears – Circus. Recording Industry Association of America. [2009-04-17]. 若有必要，請按「Advanced」，再按「Format」，然後選擇「Album」，最後按「SEARCH」。
American single certifications – Britney Spears – Circus. Recording Industry Association of America. 2023-10-24 [2024-02-14]. （原始内容存档于2024-02-14）（英语）.

riaj.or.jp

一般社団法人日本レコード協会｜各種統計. RIAJ. [2011-08-07]. （原始内容存档于2011-08-10）（日语）.
The Record 2009年3月号. RIAJ. 2009-03 [2021-08-28]. （原始内容存档于2021-08-28）（日语）.

robertchristgau.com

Robert Christgau. CG: Britney Spears. RobertChristgau.com. [2012-07-05]. （原始内容存档于2013-06-27）.

rollingstone.com

Caryn Ganz. Circus by Britney Spears. Rolling Stone. Jann Wenner. 2008-12-12 [2011-08-07]. （原始内容存档于2011-02-16）.
Britney Spears "Extremely Upset" By Australia Lip-Synch Controversy. Rolling Stone. Wenner Media LLC. 2009-11-09 [2013-01-18]. （原始内容存档于2013-02-03）.

slagerlistak.hu

Arany - és platinalemezek - 2009. MAHASZ. [2020-10-27]. （原始内容存档于2020-10-27）（匈牙利语）.

slantmagazine.com

Eric Henderson. Britney Spears: Circus. Slant Magazine. 2008-11-25 [2013-11-28]. （原始内容存档于2013-12-03）.

snepmusique.com

Classement Albums – année 2008. Syndicat National de l'Édition Phonographique. [2016-12-22]. （原始内容存档于2013-12-05）（法语）.
Classement Albums – année 2009. Syndicat National de l'Édition Phonographique. [2016-12-22]. （原始内容存档于2013-09-21）（法语）.
French single certifications – Britney Spears – Circus. Syndicat National de l'Édition Phonographique. 2008-12-17 [2024-02-14]. （原始内容存档于2024-02-14）（法语）.

spanishcharts.com

"Britney Spears – Circus". Spanishcharts.com. Hung Medien. [2013-11-28].

spotify.com

play.spotify.com

存档副本. [2018-05-25]. （原始内容存档于2023-02-23）.

sputnikmusic.com

Rudy K. Review: Britney Spears - Circus. Sputnikmusic. 2009-11-26 [2018-05-16]. （原始内容存档于2013-01-04）.

sverigetopplistan.se

Årslista Album – År 2008. Sverigetopplistan. [2016-12-22]. （原始内容存档于2016-03-04）（瑞典语）.

swedishcharts.com

Swedishcharts.com – Britney Spears – Out from Under. Singles Top 60. Hung Medien. [2011-04-26]. （原始内容存档于2011-11-25）.
"Britney Spears – Circus". Swedishcharts.com. Hung Medien. [2013-11-28].

swisscharts.com

"Britney Spears – Circus". Swisscharts.com. Hung Medien. [2013-11-28].
Swiss Year-End Charts 2009. swisscharts.com. Hung Medien. [2016-12-22]. （原始内容存档于2014-11-16）.
Gewinner 2008. IFPI Switzerland. [2023-12-02]. （原始内容存档于2023-12-02）（德语）.

tabascohoy.com.mx

A Britney Spears ¡Mexicanos le dan Oro!. Tabasco Hoy. 2008-12-10 [2013-03-03]. （原始内容存档于2011-07-22）.

theguardian.com

Alexis Petridis. Review: Britney Spears: Circus. The Guardian (Guardian News and Media). 2008-11-28 [2008-12-05]. （原始内容存档于2013-09-30）.
Alexis Petridis. CD Review: Britney Spears 'Circus' review. The Guardian (Guardian Media Group). 2008-11-28 [2008-11-28]. （原始内容存档于2013-09-30）.
Robinson, Peter. Pop review: Britney Spears, Womanizer (JIVE). The Guardian (Guardian Media Group). 2008-10-12 [2010-01-01]. （原始内容存档于2013-12-27）.

thesun.co.uk

Gordon Smart. Britney releases her most shocking work ever. BritneySpears.com. 2008-11-07 [2008-11-07]. （原始内容存档于2008-12-11）.
Poppy Cosyns. Sun Track by Track. The Sun (News International). 2008-11-28 [2008-05-31]. （原始内容存档于2009-01-08）.

twitter.com

Adam Leber. No South American leg. Twitter. 2009-07-25 [2009-12-23]. （原始内容存档于2014-02-19）.
La seule et unique @britneyspears fête ses 37 ans aujourd'hui. Retour sur 5 de ses plus grands tubes. CStar. [2021-06-17]. （原始内容存档于2021-06-17）（法语）.

typepad.com

fuseblog.typepad.com

And The Best Of 2009 Winner Is.... Billboard. Prometheus Global Media. 2009-12-12 [2013-03-03]. （原始内容存档于2012-11-10）.

ukchartsplus.co.uk

Official Album Chart – 2009 (PDF). UKChartsPlus（英语：UKChartsPlus）: 7. [2016-12-22]. （原始内容存档 (PDF)于2012-03-26）.

ultratop.be

"Britney Spears – Circus" (in Dutch). Ultratop.be. Hung Medien. [2013-11-28].
"Britney Spears – Circus" (in French). Ultratop.be. Hung Medien. [2013-11-28].
Rapports Annuels 2008 – Albums. Ultratop. Hung Medien. [2016-12-22]. （原始内容存档于2012-10-26）（法语）.
Jaaroverzichten 2009 – Albums. Ultratop. Hung Medien. [2010-10-09]. （原始内容存档于2014-08-28）（荷兰语）.
Rapports Annuels 2009 – Albums. Ultratop. Hung Medien. [2010-10-09]. （原始内容存档于2012-06-07）（法语）.

usatoday.com

usatoday30.usatoday.com

Steve Jones. Britney Spears maximizes her pop appeal in 'Circus'. USA Today (Gannett Company（英语：Gannett Company）). 2008-11-26 [2013-04-07]. （原始内容存档于2012-10-24）.

usmagazine.com

Exclusive: Britney Spears Recording New Album. OK!. Northern & Shell（英语：Northern & Shell）. 2008-06-28 [2011-08-07]. （原始内容存档于2008-06-28）.

villagevoice.com

On Britney Spears's Sadly Generic Circus. Village Voice. Lewis, Miles Marshall. 2008-12-10 [2014-02-07]. （原始内容存档于2015-03-20）.

voanoticias.com

Britney Spears vendió un millón de copias de "Blackout". Voice of America. 2012-05-30 [2012-05-31]. （原始内容存档于2012-05-31）（西班牙语）.

web.archive.org

Circus – Britney Spears. AllMusic. December 2, 2008 [October 13, 2017]. （原始内容存档于2017年10月13日）.
Caryn Ganz. Circus by Britney Spears. Rolling Stone. Jann Wenner. 2008-12-12 [2011-08-07]. （原始内容存档于2011-02-16）.
A&R, Record Label / Company, Music Publishing, Artist Manager and Music Industry Directory. Hit Quarters. [2011-08-07]. （原始内容存档于2010-11-19）.
Natasha Stoynoff. Britney Spears Working and 'Having Fun' on New Album. People. Time Inc. 2008-07-16 [2011-08-07]. （原始内容存档于2011-05-21）.
Jocelyn Vena. Britney Spears' Dad Gets Permanent Conservatorship. The Huffington Post. AOL. 2008-10-29 [2013-01-18]. （原始内容存档于2012-09-03）.
Britney Spending Summer In The Studio. Billboard. Prometheus Global Media. 2008-07-17 [2011-08-07]. （原始内容存档于2013-04-14）.
Marisa Laudadio. Producer: Britney Is 'Really Shaping Up'. People. Time Inc. 2008-05-21 [2011-08-07]. （原始内容存档于2011-09-12）.
Exclusive: Britney Spears Recording New Album. OK!. Northern & Shell（英语：Northern & Shell）. 2008-06-28 [2011-08-07]. （原始内容存档于2008-06-28）.
Jocelyn Vena. Britney Spears Explains Why Circus Is 'Lighter' And Less Edgy Than Blackout. MTV News. Viacom. 2008-11-20 [2011-08-07]. （原始内容存档于2015-07-26）.
World Exclusive: Britney Reveals All!. OK!. Northern & Shell. 2008-08-12 [2013-03-02]. （原始内容存档于2009-07-17）.
Gil Kaufman. Britney Spears Says New Album Is Her 'Best Work Ever,' Describes Shock Of Jamie Lynn's Pregnancy. MTV News（英语：MTV News）. Viacom. 2008-08-13 [2011-08-07]. （原始内容存档于2015-06-27）.
A&R, Record Label / Company, Music Publishing, Artist Manager and Music Industry Directory. Hit Quarters. [2011-08-07]. （原始内容存档于2010-11-19）.
Jennfier Vineyard. Britney Spears' New Album, Circus, Slated For December 2 Release. MTV News. Viacom. 2008-09-15 [2011-08-07]. （原始内容存档于2015-08-01）.
Works. F2 Inc. [2008-07-29]. （原始内容存档于2008-06-23）.
Jennifer Vineyard. Britney Spears' collaborators talk about new album. MTV News. Viacom. 2008-09-11 [2013-04-07]. （原始内容存档于2008-09-12）.
Spears wants child-friendly home. BBC News. BBC. 2008-07-01 [2008-07-02]. （原始内容存档于2008-07-20）.
Shirley Halperin. Confirmed: Britney Spears working on new album. Entertainment Weekly. Time Inc. 2008-07-16 [2013-04-07]. （原始内容存档于2008-08-28）.
Kim Dawson. Cruz pens Brit songs. Daily Star. Northern & Shell. 2008-07-03 [2008-07-27]. （原始内容存档于2013-12-07）.
Nick Levine. E Notes on the new Britney album. Digital Spy. Hearst Corporation. 2008-11-10 [2013-04-07]. （原始内容存档于2012-10-24）.
Ann Powers. Album review: Britney Spears' 'Circus'. Los Angeles Times (Tribune Company（英语：Tribune Company）). 2008-12-06 [2008-12-30]. （原始内容存档于2010-08-09）.
Lighter, brighter Circus. Canoe. 2008-12-02 [2008-12-02]. （原始内容存档于2013-10-02）.
Album: Britney Spears, Circus (Zomba/Sony). The Independent. 2008-11-28 [2009-09-06]. （原始内容存档于2012-11-05）.
Gordon Smart. Britney releases her most shocking work ever. BritneySpears.com. 2008-11-07 [2008-11-07]. （原始内容存档于2008-12-11）.
Poppy Cosyns. Sun Track by Track. The Sun (News International). 2008-11-28 [2008-05-31]. （原始内容存档于2009-01-08）.
Britney Spears Calls New Song 'A Girl Anthem'. People. Time Inc. 2008-09-29 [2008-10-18]. （原始内容存档于2008-10-30）.
It's some Britney bits. PopJustice. 2008-11-11 [2013-03-02]. （原始内容存档于2008-12-19）.
Nick Levine. Notes on the new Britney album - Music The Sound. Digital Spy. Hearst Corporation. 2008-11-10 [2011-08-07]. （原始内容存档于2012-10-24）.
Britney Spears' 'If U Seek Amy' Poses Censorship Problems For Radio. MTV News. Viacom. 2009-01-12 [2013-01-18]. （原始内容存档于2014-05-21）.
Chris Willman. Circus Review. Entertainment Weekly. Time Inc. 2008-11-29 [2013-11-28]. （原始内容存档于2012-01-12）.
Chris Willman. Circus Review. Entertainment Weekly (Time Inc.). 2008-11-29 [2011-08-07]. （原始内容存档于2012-01-12）.
Circus Review. NME. 2008-11-28 [2009-09-06]. （原始内容存档于2009-01-22）.
Interview with Nicole Morier. HitQuarters. 2010-08-23 [2010-08-24]. （原始内容存档于2012-03-14）.
Alexis Petridis. Review: Britney Spears: Circus. The Guardian (Guardian News and Media). 2008-11-28 [2008-12-05]. （原始内容存档于2013-09-30）.
Alexis Petridis. CD Review: Britney Spears 'Circus' review. The Guardian (Guardian Media Group). 2008-11-28 [2008-11-28]. （原始内容存档于2013-09-30）.
Britney Spears: Circus (Album Review) - MuMuuse. MuuMuse（英语：MuuMuse）. 2008-11-17 [2013-09-24]. （原始内容存档于2013-10-03）.
Wener, Ben. A better Britney doesn't make for a better Britney album: Soundcheck blog: Orange County Register. The Orange County Register（英语：The Orange County Register）. 2013-12-04 [2011-01-30]. （原始内容存档于2013-09-26）.
Stephen M. Silverman. Britney to Release New Album on Her Birthday. People. Time Inc. 2008-09-15 [2011-08-08]. （原始内容存档于2011-03-29）.
Gil Kaufman. Britney Spears' Circus Now Available For Streaming On Imeem. MTV News. Viacom. 2008-11-25 [2011-08-08]. （原始内容存档于2016-05-14）.
Take That set to spar with Spears. BBC News. BBC. 2008-10-14 [2013-04-07]. （原始内容存档于2010-11-19）.
Mobile. Britney.com. [2011-08-07]. （原始内容存档于2011-03-16）.
Jocelyn Vena. Britney Spears Gives Fans A Taste Of Circus With Online Preview. MTV News. Viacom. 2008-12-13 [2013-04-07]. （原始内容存档于2012-11-07）.
Jocelyn Vena. Britney Spears Documentary To Air November 30. MTV News. Viacom. 2008-10-09 [2013-04-07]. （原始内容存档于2012-10-24）.
Britney.com Global Fan Fiction Contest. Britney.com. [2018-05-25]. （原始内容存档于2011-07-25）.
World Premiere: "Kill The Lights" Animated Video. Britney.com. [2009-12-31]. （原始内容存档于2009-07-30）.
Britney joins Madonna on US stage. BBC News. BBC. 2008-11-07 [2008-11-07]. （原始内容存档于2008-11-08）.
Britney Spears to perform live at Bambi Awards, Germany. The Pantagraph（英语：The Pantagraph） (Lee Enterprises). 2008-11-26 [2013-04-07]. （原始内容存档于2011-08-11）.
Sarah Tetteh, Sarah. Britney Spears exclusive pictures: Singer prepares raunchy routine for X Factor. Daily Mirror (Trinity Mirror（英语：Trinity Mirror）). 2008-10-22 [2013-03-03]. （原始内容存档于2008-12-18）.
'X Factor' hits 12.8m ratings high. Digital Spy. Hearst Corporation. 2008-11-30 [2013-04-07]. （原始内容存档于2012-10-10）.
Joe Piazza. Britney Spears Makes TV Comeback On 'Good Morning America'. Daily News (Mortimer Zuckerman). 2008-12-02 [2013-04-07]. （原始内容存档于2012-10-21）.
Jocelyn Vena. Britney Spears Wows Fans, Family With 'Good Morning America' Birthday Performance. MTV News. Viacom. 2008-12-02 [2013-04-07]. （原始内容存档于2012-11-03）.
Britney Spears Wows Japan TV fans With Womanizer Show. Herald Sun（英语：Herald Sun） (News Corporation). 2008-12-17 [2013-04-07]. （原始内容存档于2011-08-09）.
Gil Kaufman. Britney Spears Adds Circus Tour Dates Thanks To Strong Sales. MTV News. Viacom. 2008-12-10 [2013-04-07]. （原始内容存档于2012-11-05）.
Jocelyn Vena. Britney Spears' Manager Calls Circus Tour A 'Pop Extravaganza'. MTV News. Viacom. 2009-03-03 [2013-04-07]. （原始内容存档于2012-11-05）.
Gil Kaufman. Britney Spears To Kick Off Circus Tour In March. MTV News. Viacom. 2008-12-02 [2011-08-07]. （原始内容存档于2014-08-19）.
Adam Leber. No South American leg. Twitter. 2009-07-25 [2009-12-23]. （原始内容存档于2014-02-19）.
Britney Spears "Extremely Upset" By Australia Lip-Synch Controversy. Rolling Stone. Wenner Media LLC. 2009-11-09 [2013-01-18]. （原始内容存档于2013-02-03）.
Joe Reinartz. The Pollstar Top 50. Pollstar（英语：Pollstar）. 2009-12-30 [2013-04-07]. （原始内容存档于2012-03-22）.
2009 Year End Top 50 Worldwide Concert Tours (PDF). Pollstar. 2010 [2010-02-08]. （原始内容 (PDF)存档于2016-09-09）.
Ani Esmailian. 15 Most Profitable Female Tours Ever. Stereotude. 2010-05-21 [2013-03-03]. （原始内容存档于2012-03-21）.
Robinson, Peter. Pop review: Britney Spears, Womanizer (JIVE). The Guardian (Guardian Media Group). 2008-10-12 [2010-01-01]. （原始内容存档于2013-12-27）.
Spears Scores Record-Setting Hot 100 Jump. Billboard. Prometheus Global Media. 2012-11-12 [2013-03-02]. （原始内容存档于2012-11-10）.
Gary Trust. Best Of 2009: Part 1. Billboard (Prometheus Global Media). 2009-12-15 [2013-03-03]. （原始内容存档于2013-03-03）.
Paul Grein. Week Ending April 11, 2010: Bieber Bounces Back. Yahoo! Music（英语：Yahoo! Music）. Yahoo!. 2010-04-11 [2013-04-07]. （原始内容存档于2012-10-11）.
Jocelyn Vena. Britney Spears' 'Womanizer' Director Joseph Kahn Talks 'Toxic' Comparisons. MTV News. Viacom. 2008-10-17 [2013-04-07]. （原始内容存档于2012-11-07）.
James Montgomery. Britney Spears' 'Circus' Video - Check It Out Here!. MTV News. Viacom. 2008-12-05 [2013-04-07]. （原始内容存档于2012-11-03）.
Katie Hasty. Britney's 'Circus' Debuts Atop Album Chart. Billboard (Prometheus Global Media). 2008-12-10 [2010-01-04]. （原始内容存档于2013-05-18）.
Paul Grein. Week Ending April 5, 2009: A Prince Beats A King (Of Pop). Yahoo! Music. Yahoo!. 2009-04-08 [2013-04-07]. （原始内容存档于2012-09-20）.
And The Best Of 2009 Winner Is.... Billboard. Prometheus Global Media. 2009-12-12 [2013-03-03]. （原始内容存档于2012-11-10）.
David Hinckley. Z100 needs Britney Spears to clean up. Daily News (Mortimer Zuckerman（英语：Mortimer Zuckerman）). 2009-01-23 [2013-04-07]. （原始内容存档于2012-10-25）.
Britney Spears - Chart history. Billboard. Prometheus Global Media. [2013-03-03]. （原始内容存档于2015-07-09）.
Jocelyn Vena. Britney Spears' New 'Radar' Video Leaks. MTV News. Viacom. 2009-07-01 [2013-04-07]. （原始内容存档于2012-11-03）.
Britney Spears – Radar charts. Billboard. Prometheus Global Media. [2013-03-02]. （原始内容存档于2012-11-07）.
Circus by Britney Spears reviews. AnyDecentMusic?. [2016-12-25]. （原始内容存档于2016-12-26）.
Circus by Britney Spears. [2018-05-25]. （原始内容存档于2012-08-30）.
Stephen Thomas Erlewine. Circus: Britney Spears. AllMusic. Rovi Corporation. [2013-11-28]. （原始内容存档于2013-11-25）.
Album: Britney Spears, Circus (Zomba/Sony). The Independent (Independent Print). 2008-11-28 [2013-11-28]. （原始内容存档于2012-11-05）.
Ann Powers. Album review: Britney Spears' 'Circus'. Los Angeles Times (Tribune Company). 2008-11-30 [2013-11-28]. （原始内容存档于2010-08-09）.
Jon Pareles. Critics' Choice - New CDs From - Britney Spears, Akon, Cynic and John Escreet. The New York Times (The New York Times Company). 2008-11-30 [2013-11-28]. （原始内容存档于2013-12-20）.
Hamish MacBain. NME Album Reviews – Britney Spears. NME. Time Inc. 2008-11-28 [2013-04-17]. （原始内容存档于2013-03-13）.
Eric Henderson. Britney Spears: Circus. Slant Magazine. 2008-11-25 [2013-11-28]. （原始内容存档于2013-12-03）.
Steve Jones. Britney Spears maximizes her pop appeal in 'Circus'. USA Today (Gannett Company（英语：Gannett Company）). 2008-11-26 [2013-04-07]. （原始内容存档于2012-10-24）.
Circus Reviews. Metacritic. CBS Interactive. [2013-11-28]. （原始内容存档于2014-03-29）.
Genevieve Koski. Britney Spears: Circus. The A.V. Club. The Onion. 2008-12-08 [2013-11-28]. （原始内容存档于2013-12-03）.
Nick Levine. Notes on the new Britney album. Digital Spy. Hearst Corporation. 2008-11-10 [2013-11-28]. （原始内容存档于2012-10-24）.
Robert Christgau. CG: Britney Spears. RobertChristgau.com. [2012-07-05]. （原始内容存档于2013-06-27）.
On Britney Spears's Sadly Generic Circus. Village Voice. Lewis, Miles Marshall. 2008-12-10 [2014-02-07]. （原始内容存档于2015-03-20）.
Nominados Premios Oye! 2009. Blog Telenovelas. [2018-05-25]. （原始内容存档于2011-03-19）.
Artist Summary - The JUNO Awards. junoawards.ca. [2018-05-25]. （原始内容存档于2015-01-23）.
Hasty, Katie. Britney's 'Circus' Debuts Atop Album Chart. Billboard. 2008-12-10 [2015-07-16]. （原始内容存档于2013-05-18）.
Week Ending Jan. 25, 2009: Setting A Hot 100 Record - Chart Watch. Yahoo! Music. Yahoo!. 2009-01-28 [2013-04-07]. （原始内容存档于2013-04-07）.
Week Ending Feb. 1, 2009: That's Why They Call Him The Boss - Chart Watch. Yahoo! Music. Yahoo!. 2009-02-04 [2013-04-07]. （原始内容存档于2012-09-20）.
Trust, Gary. Ask Billboard: Britney Spears's Career Sales. Billboard. Prometheus Global Media. 2015-03-24 [2015-03-24]. （原始内容存档于2015-03-27）.
John Williams. Britney returns to No. 1. Canoe Jam!. 2008-12-10 [2009-06-20]. （原始内容存档于2009-09-08）.
The Nielsen Company 2008 Canadian Music Industry Report. Reuters. Thomson Reuters. 2009-01-07 [2013-04-07]. （原始内容存档于2012-11-14）.
A Britney Spears ¡Mexicanos le dan Oro!. Tabasco Hoy. 2008-12-10 [2013-03-03]. （原始内容存档于2011-07-22）.
Britney Spears - Circus. aCharts. [2013-04-17]. （原始内容存档于2011-01-15）.
British single certifications – Britney Spears – Circus. British Phonographic Industry. 2009-01-09 [2021-12-13]. （原始内容存档于2021-12-13）（英语）.
Tops : Britney déçoit, Quentin surprend. Charts in France. 2008-12-02 [2008-12-05]. （原始内容存档于2008-12-05）.
検索結果-Oricon Style アーティスト/CD検索. Oricon. [2011-08-07]. （原始内容存档于2011-06-04）.
一般社団法人日本レコード協会｜各種統計. RIAJ. [2011-08-07]. （原始内容存档于2011-08-10）（日语）.
Britney Spears - US and Canandian Chart History. Allmusic. Rovi Corporation. [2013-04-07]. （原始内容存档于2012-02-25）.
Swedishcharts.com – Britney Spears – Out from Under. Singles Top 60. Hung Medien. [2011-04-26]. （原始内容存档于2011-11-25）.
iTunes - Música - Circus de Britney Spears. iTunes Store (MX). Apple Inc. November 28, 2008 [July 14, 2013]. （原始内容存档于2014年2月28日）.
存档副本. [2018-05-25]. （原始内容存档于2023-02-23）.
存档副本. [2014-06-29]. （原始内容存档于2015-04-02）.
Circus. store.britneyspears.com. [2018-05-25]. （原始内容存档于2016-08-09）.
iTunes - Music - Circus (Deluxe Version) by Britney Spears. iTunes Store (IE). Apple Inc. November 28, 2008 [November 28, 2013]. （原始内容存档于2014年2月28日）.
Circus - Britney Spears: Credits. AllMusic. Rovi Corporation. [2013-11-28]. （原始内容存档于2017-08-12）.
TOP KOMBINIRANIH - TJEDAN 49. 2008.. Hrvatska diskografska udruga. 2008-12-11 [2013-11-28]. （原始内容存档于2017-08-11）.
Sexton, Paul. Britney Scores Euro Chart Double. Billboard. 2008-12-11 [2016-12-22]. （原始内容存档于2016-10-01）.
Top 50 Ελληνικών και Ξένων Aλμπουμ – Εβδομάδα 2/2009 [Top 50 Greek and Foreign Albums – Week 2/2009]. IFPI Greece. [2016-12-22]. （原始内容存档于2009-02-01）（希腊语）.
サーカス | ブリトニー・スピアーズ [Circus | Britney Spears]. Oricon. [2016-12-22]. （原始内容存档于2016-12-22）（日语）.
Britney Spears – Blackout. mexicancharts.com. Hung Medien. [2013-11-28]. （原始内容存档于2012-10-19）.
Россия Top 25: Андрей Бандера – Не любить невозможно (неделя 07-2009). 2M. 2009-02-18 [2016-08-30]. （原始内容存档于2009-02-24）（俄语）.
ARIA Charts – End Of Year Charts – Top 100 Albums 2008. Australian Recording Industry Association. [2009-03-22]. （原始内容存档于2016-02-29）.
ARIA Charts – End Of Year Charts – Top 50 Dance Albums 2008. Australian Recording Industry Association. [2016-12-22]. （原始内容存档于2012-03-20）.
Album 2008 Top-100. Hitlisten.NU. [2014-01-06]. （原始内容存档于2011-07-19）（丹麦语）.
Classement Albums – année 2008. Syndicat National de l'Édition Phonographique. [2016-12-22]. （原始内容存档于2013-12-05）（法语）.
Annual Charts – Year 2008: Top 50 Ξένων Aλμπουμ [Annual Charts – Year 2008: Top 50 Foreign Albums]. IFPI Greece. [2013-03-03]. （原始内容存档于2012-02-10）（希腊语）.
Los Más Vendidos 2008 (PDF). Asociación Mexicana de Productores de Fonogramas y Videogramas. [2010-03-11]. （原始内容存档 (PDF)于2010-02-15）（西班牙语）.
Årslista Album – År 2008. Sverigetopplistan. [2016-12-22]. （原始内容存档于2016-03-04）（瑞典语）.
End of Year Album Chart Top 100 – 2008. Official Charts Company. [2016-12-22]. （原始内容存档于2015-07-12）.
Top 50 Global Best Selling Albums for 2008 (PDF). International Federation of the Phonographic Industry. [2011-08-07]. （原始内容存档 (PDF)于2009-02-18）.
ARIA Charts – End Of Year Charts – Top 100 Albums 2009. Australian Recording Industry Association. [2010-10-17]. （原始内容存档于2014-04-01）.
ARIA Charts – End Of Year Charts – Top 50 Dance Albums 2009. Australian Recording Industry Association. [2016-12-22]. （原始内容存档于2013-04-10）.
Jahreshitparade Alben 2009. austriancharts.at. Hung Medien. [2016-12-22]. （原始内容存档于2016-01-22）（德语）.
Album 2009 Top-100. Hitlisten.NU. [2011-10-12]. （原始内容存档于2010-09-26）（丹麦语）.
Year End Charts – European Top 100 Albums. Billboard. 2009 [2016-12-22]. （原始内容存档于2012-10-03）.
Classement Albums – année 2009. Syndicat National de l'Édition Phonographique. [2016-12-22]. （原始内容存档于2013-09-21）（法语）.
オリコン年間 CDアルバムランキング 2009年度 [Oricon Annual CD Album Ranking 2009]. Oricon. [2016-12-22]. （原始内容存档于2016-12-22）（日语）.
Los Más Vendidos 2009 (PDF). Asociación Mexicana de Productores de Fonogramas y Videogramas. [2010-03-11]. （原始内容存档 (PDF)于2010-02-15）（西班牙语）.
Swiss Year-End Charts 2009. swisscharts.com. Hung Medien. [2016-12-22]. （原始内容存档于2014-11-16）.
Billboard 200 Albums – Year-End 2009. Billboard. [2016-12-22]. （原始内容存档于2015-02-28）.
Circus Oro Argentina. CAPIF. [2017-12-12]. （原始内容存档于2009-09-09）（西班牙语）.
Goud en platina Albums 2008. Ultratop. [2020-09-21]. 原始内容存档于2020-09-21 （荷兰语）.
"Circus" de Britney Spears já vendeu mais de 1 milhão nos E.U.A. POPline. 2009-01-30 [2015-07-14]. （原始内容存档于2015-07-14）（葡萄牙语）.
Guld Og Platin I August. IFPI Denmark. [2015-01-17]. （原始内容存档于2015-01-17）（丹麦语）.
French single certifications – Britney Spears – Circus. Syndicat National de l'Édition Phonographique. 2008-12-17 [2024-02-14]. （原始内容存档于2024-02-14）（法语）.
La seule et unique @britneyspears fête ses 37 ans aujourd'hui. Retour sur 5 de ses plus grands tubes. CStar. [2021-06-17]. （原始内容存档于2021-06-17）（法语）.
IFPI Middle East Awards - 2009. IFPI Middle East. [2013-08-07]. （原始内容存档于2013-08-07）（英语）.
Gold-/Platin-Datenbank (Britney Spears; 'Circus'). Bundesverband Musikindustrie. [2023-11-02]. （原始内容存档于2023-11-02）（德语）.
Top 50 Ξένων Aλμπουμ Εβδομάδα 10/2009. IFPI Greece. [2009-03-26]. （原始内容存档于2009-03-26）（希腊语）.
Arany - és platinalemezek - 2009. MAHASZ. [2020-10-27]. （原始内容存档于2020-10-27）（匈牙利语）.
2008 Certification Awards Platinum. Irish Recorded Music Association. [2013-11-02]. （原始内容存档于2013-11-02）（英语）.
The Record 2009年3月号. RIAJ. 2009-03 [2021-08-28]. （原始内容存档于2021-08-28）（日语）.
ブリトニー・スピアーズデビュー10周年記念、全ヒット・シングルを完全網羅する最強ベスト盤11月25日に全世界同時緊急発売が決定！. Billboard Japan. 2009-09-24 [2019-07-10]. （原始内容存档于2019-07-10）（日语）.
Certificaciones AMPROFON. Asociación Mexicana de Productores de Fonogramas y Videogramas. 2008-12-09 [2018-03-17]. （原始内容存档于2018-03-17）（西班牙语）. 在「Filter」欄位輸入「Circus」。
Latest Gold / Platinum Albums. RIANZ. [2011-07-24]. （原始内容存档于2011-07-24）（英语）.
Wyróżnienia – Złote płyty CD - Archiwum - Przyznane w 2009 roku. Polish Society of the Phonographic Industry. [2015-06-27]. （原始内容存档于2015-06-27）（波兰语）.
Gewinner 2008. IFPI Switzerland. [2023-12-02]. （原始内容存档于2023-12-02）（德语）.
American single certifications – Britney Spears – Circus. Recording Industry Association of America. 2023-10-24 [2024-02-14]. （原始内容存档于2024-02-14）（英语）.
Britney Spears vendió un millón de copias de "Blackout". Voice of America. 2012-05-30 [2012-05-31]. （原始内容存档于2012-05-31）（西班牙语）.
Circus – Britney Spears: Amazon.de: Musik. Amazon.de. 2008-11-28 [2017-10-13]. （原始内容存档于2017-10-13）.
Circus – Deluxe Edition mit Bonus-DVD — incl. Poster – Britney Spears: Amazon.de: Musik. [2017-12-12]. （原始内容存档于2017-12-28）.
Circus von Britney Spears in iTunes. iTunes Store (DE). Apple Inc. 2008-11-28 [2017-10-13]. （原始内容存档于2017-10-04）（德语）.
Circus by Britney Spears on iTunes. iTunes Store (GB). Apple Inc. 2008-11-28 [2017-10-13]. （原始内容存档于2017-10-14）.
Circus: Britney Spears: Amazon.co.uk: MP3 Downloads. Amazon.co.uk. 2008-11-28 [2017-10-13]. （原始内容存档于2017-10-14）.
Amazon.com: Circus (Deluxe Version): Britney Spears: MP3 Downloads. Amazon Music. 2008-12-02 [2017-10-13]. （原始内容存档于2017-02-02）.
Britney Spears – Circus – Amazon.com Music. Amazon Music. 2008-12-02 [2017-10-13]. （原始内容存档于2016-05-09）.
Circus by Britney Spears on iTunes. iTunes Store (US). Apple Inc. 2008-11-28 [2017-10-13]. （原始内容存档于2017-10-14）.
Circus : Britney Spears. HMV. 2008-12-03 [2017-10-13]. （原始内容存档于2017-10-14）.
ブリトニー・スピアーズ「Circus」を iTunes で. iTunes Store (JP). Apple Inc. 2008-11-28 [2017-10-13]. （原始内容存档于2017-10-14）（日语）.

webcitation.org

Rapports Annuels 2008 – Albums. Ultratop. Hung Medien. [2016-12-22]. （原始内容存档于2012-10-26）（法语）.
Jaaroverzichten 2009 – Albums. Ultratop. Hung Medien. [2010-10-09]. （原始内容存档于2014-08-28）（荷兰语）.
Rapports Annuels 2009 – Albums. Ultratop. Hung Medien. [2010-10-09]. （原始内容存档于2012-06-07）（法语）.
Official Album Chart – 2009 (PDF). UKChartsPlus（英语：UKChartsPlus）: 7. [2016-12-22]. （原始内容存档 (PDF)于2012-03-26）.

wikipedia.org

en.wikipedia.org

Exclusive: Britney Spears Recording New Album. OK!. Northern & Shell（英语：Northern & Shell）. 2008-06-28 [2011-08-07]. （原始内容存档于2008-06-28）.
Gil Kaufman. Britney Spears Says New Album Is Her 'Best Work Ever,' Describes Shock Of Jamie Lynn's Pregnancy. MTV News（英语：MTV News）. Viacom. 2008-08-13 [2011-08-07]. （原始内容存档于2015-06-27）.
Ann Powers. Album review: Britney Spears' 'Circus'. Los Angeles Times (Tribune Company（英语：Tribune Company）). 2008-12-06 [2008-12-30]. （原始内容存档于2010-08-09）.
Britney Spears: Circus (Album Review) - MuMuuse. MuuMuse（英语：MuuMuse）. 2008-11-17 [2013-09-24]. （原始内容存档于2013-10-03）.
Wener, Ben. A better Britney doesn't make for a better Britney album: Soundcheck blog: Orange County Register. The Orange County Register（英语：The Orange County Register）. 2013-12-04 [2011-01-30]. （原始内容存档于2013-09-26）.
Britney Spears to perform live at Bambi Awards, Germany. The Pantagraph（英语：The Pantagraph） (Lee Enterprises). 2008-11-26 [2013-04-07]. （原始内容存档于2011-08-11）.
Sarah Tetteh, Sarah. Britney Spears exclusive pictures: Singer prepares raunchy routine for X Factor. Daily Mirror (Trinity Mirror（英语：Trinity Mirror）). 2008-10-22 [2013-03-03]. （原始内容存档于2008-12-18）.
Britney Spears Wows Japan TV fans With Womanizer Show. Herald Sun（英语：Herald Sun） (News Corporation). 2008-12-17 [2013-04-07]. （原始内容存档于2011-08-09）.
Joe Reinartz. The Pollstar Top 50. Pollstar（英语：Pollstar）. 2009-12-30 [2013-04-07]. （原始内容存档于2012-03-22）.
Paul Grein. Week Ending April 11, 2010: Bieber Bounces Back. Yahoo! Music（英语：Yahoo! Music）. Yahoo!. 2010-04-11 [2013-04-07]. （原始内容存档于2012-10-11）.
David Hinckley. Z100 needs Britney Spears to clean up. Daily News (Mortimer Zuckerman（英语：Mortimer Zuckerman）). 2009-01-23 [2013-04-07]. （原始内容存档于2012-10-25）.
Daniel Kreps. Britney Spears Premieres Video For Controversial "If U Seek Amy". Rolling Stone (Wenner Media LLC（英语：Jann Wenner）). 2009-03-12. ISSN 0035-791X.
Steve Jones. Britney Spears maximizes her pop appeal in 'Circus'. USA Today (Gannett Company（英语：Gannett Company）). 2008-11-26 [2013-04-07]. （原始内容存档于2012-10-24）.
Official Album Chart – 2009 (PDF). UKChartsPlus（英语：UKChartsPlus）: 7. [2016-12-22]. （原始内容存档 (PDF)于2012-03-26）.

worldcat.org

Daniel Kreps. Britney Spears Premieres Video For Controversial "If U Seek Amy". Rolling Stone (Wenner Media LLC（英语：Jann Wenner）). 2009-03-12. ISSN 0035-791X.

yahoo.com

music.yahoo.com

Paul Grein. Week Ending April 11, 2010: Bieber Bounces Back. Yahoo! Music（英语：Yahoo! Music）. Yahoo!. 2010-04-11 [2013-04-07]. （原始内容存档于2012-10-11）.
Paul Grein. Week Ending April 5, 2009: A Prince Beats A King (Of Pop). Yahoo! Music. Yahoo!. 2009-04-08 [2013-04-07]. （原始内容存档于2012-09-20）.
Week Ending Jan. 25, 2009: Setting A Hot 100 Record - Chart Watch. Yahoo! Music. Yahoo!. 2009-01-28 [2013-04-07]. （原始内容存档于2013-04-07）.
Week Ending Feb. 1, 2009: That's Why They Call Him The Boss - Chart Watch. Yahoo! Music. Yahoo!. 2009-02-04 [2013-04-07]. （原始内容存档于2012-09-20）.

zpav.pl

bestsellery.zpav.pl

Wyróżnienia – Złote płyty CD - Archiwum - Przyznane w 2009 roku. Polish Society of the Phonographic Industry. [2015-06-27]. （原始内容存档于2015-06-27）（波兰语）.