妮裳馬戲團巡迴演唱會 (Chinese Wikipedia)

Exclusive: The Setlist — Britney Spears. Web.archive.org. March 2, 2009 [May 11, 2013]. （原始内容存档于2009年3月3日）.
Updated Tour Announcement: Eastern European Dates Added!. britneyspears.com. Brandcasting Unlimited. April 29, 2009 [April 29, 2009]. （原始内容存档于2009年5月2日）.
Reporter, Lauren. Breaking News: Jordin Sparks added as Opening Act. britneyspears.com (Brandcasting Unlimited). August 14, 2009 [December 22, 2009]. （原始内容存档于2009年8月18日）.
Breaking News: Adelaide Show Announced!. britneyspears.com. Brandcasting Unlimited. September 9, 2009 [September 9, 2009]. （原始内容存档于2009年9月11日）.
Poland Cancellation DetailsDate. britneyspears.com (Brandcasting Unlimited). July 15, 2009 [December 21, 2009]. （原始内容存档于2009年7月17日）.

google.ca (Global: 838^th place; Chinese: 259^th place)

books.google.ca

存档副本. [2015-02-19]. （原始内容存档于2015-02-19）.
存档副本. [2015-02-19]. （原始内容存档于2015-02-19）.
存档副本. [2015-02-19]. （原始内容存档于2015-02-19）.
存档副本. [2015-02-19]. （原始内容存档于2015-02-19）.
存档副本. [2015-02-19]. （原始内容存档于2013-12-24）.
存档副本. [2015-02-19]. （原始内容存档于2015-02-19）.

mohegansun.com (Global: low place; Chinese: low place)

newsroom.mohegansun.com

Britney Spears Reschedules March 26th Mohegan Sun Date. newsroom.mohegansun.com (Mohegan Sun). March 16, 2009 [December 21, 2009]. （原始内容存档于2013-06-24）.

mtv.com (Global: 80^th place; Chinese: 348^th place)

Vena, Jocelyn. Jordin Sparks Joins Britney Spears' Circus Tour. MTV (MTV Networks). August 17, 2009 [December 23, 2009]. （原始内容存档于2010-03-10）.

perthnow.com.au (Global: 3,244^th place; Chinese: low place)

Reporter, The Daily Telegraph. Havana Brown in a spin for Britney Spears as DJ. The Sunday Times (News Corporation). June 6, 2009 [December 31, 2009]. （原始内容存档于2012年4月11日）.

pollstarpro.com (Global: low place; Chinese: low place)

2009 Top 100 (PDF). Pollstar. [2013-12-21]. （原始内容 (PDF)存档于2013-06-19）.

technobase.fm (Global: low place; Chinese: low place)

Verkündet: Cascada offizieller Support-Act für Britney Spears. technobase.fm. July 18, 2009 [December 31, 2009]. （原始内容存档于2015-02-19）.

theweek.com (Global: 2,909^th place; Chinese: 4,868^th place)

Reporter, The Week. Perezcious Music: Perez Hilton's new record label. The Week (Dennis Publishing). June 24, 2009 [December 31, 2009]. （原始内容存档于2013-12-31）.

web.archive.org (Global: 1^st place; Chinese: 1^st place)

Exclusive: The Setlist — Britney Spears. Web.archive.org. March 2, 2009 [May 11, 2013]. （原始内容存档于2009年3月3日）.
存档副本. [2015-02-19]. （原始内容存档于2015-02-19）.
存档副本. [2015-02-19]. （原始内容存档于2015-02-19）.
存档副本. [2015-02-19]. （原始内容存档于2015-02-19）.
Updated Tour Announcement: Eastern European Dates Added!. britneyspears.com. Brandcasting Unlimited. April 29, 2009 [April 29, 2009]. （原始内容存档于2009年5月2日）.
Vena, Jocelyn. Jordin Sparks Joins Britney Spears' Circus Tour. MTV (MTV Networks). August 17, 2009 [December 23, 2009]. （原始内容存档于2010-03-10）.
Reporter, The Week. Perezcious Music: Perez Hilton's new record label. The Week (Dennis Publishing). June 24, 2009 [December 31, 2009]. （原始内容存档于2013-12-31）.
Reporter, The Daily Telegraph. Havana Brown in a spin for Britney Spears as DJ. The Sunday Times (News Corporation). June 6, 2009 [December 31, 2009]. （原始内容存档于2012年4月11日）.
Verkündet: Cascada offizieller Support-Act für Britney Spears. technobase.fm. July 18, 2009 [December 31, 2009]. （原始内容存档于2015-02-19）.
存档副本. [2015-02-19]. （原始内容存档于2015-02-19）.
存档副本. [2015-02-19]. （原始内容存档于2013-12-24）.
Reporter, Lauren. Breaking News: Jordin Sparks added as Opening Act. britneyspears.com (Brandcasting Unlimited). August 14, 2009 [December 22, 2009]. （原始内容存档于2009年8月18日）.
Breaking News: Adelaide Show Announced!. britneyspears.com. Brandcasting Unlimited. September 9, 2009 [September 9, 2009]. （原始内容存档于2009年9月11日）.
存档副本. [2015-02-19]. （原始内容存档于2015-02-19）.
Poland Cancellation DetailsDate. britneyspears.com (Brandcasting Unlimited). July 15, 2009 [December 21, 2009]. （原始内容存档于2009年7月17日）.

webcitation.org (Global: 24^th place; Chinese: 29^th place)

Britney Spears Reschedules March 26th Mohegan Sun Date. newsroom.mohegansun.com (Mohegan Sun). March 16, 2009 [December 21, 2009]. （原始内容存档于2013-06-24）.
2009 Top 100 (PDF). Pollstar. [2013-12-21]. （原始内容 (PDF)存档于2013-06-19）.

wikipedia.org (Global: low place; Chinese: low place)

en.wikipedia.org

动员人数数据分别结合了在3月11日和3月23日在拿骚老兵纪念体育馆（英语：Nassau Veterans Memorial Coliseum）的数据。

妮裳馬戲團巡迴演唱會 (Chinese Wikipedia)

britneyspears.com (Global: low place; Chinese: low place)

google.ca (Global: 838th place; Chinese: 259th place)

books.google.ca

mohegansun.com (Global: low place; Chinese: low place)

newsroom.mohegansun.com

mtv.com (Global: 80th place; Chinese: 348th place)

perthnow.com.au (Global: 3,244th place; Chinese: low place)

pollstarpro.com (Global: low place; Chinese: low place)

technobase.fm (Global: low place; Chinese: low place)

theweek.com (Global: 2,909th place; Chinese: 4,868th place)

web.archive.org (Global: 1st place; Chinese: 1st place)

webcitation.org (Global: 24th place; Chinese: 29th place)

wikipedia.org (Global: low place; Chinese: low place)

en.wikipedia.org

google.ca (Global: 838^th place; Chinese: 259^th place)

mtv.com (Global: 80^th place; Chinese: 348^th place)

perthnow.com.au (Global: 3,244^th place; Chinese: low place)

theweek.com (Global: 2,909^th place; Chinese: 4,868^th place)

web.archive.org (Global: 1^st place; Chinese: 1^st place)

webcitation.org (Global: 24^th place; Chinese: 29^th place)