References analysis of the Wikipedia article "Single numer jeden w roku 2009 (USA)" in the Polish version

billboard.com

Cohen, Jonathan: "Beyonce Celebrates Christmas Atop Hot 100". [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2008-12-24. [dostęp 2008-12-24].

Cohen, Jonathan: "Lady GaGa Dances To The Top Of Hot 100". [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-01-08. [dostęp 2009-01-09].

Cohen, Jonathan: "Lady GaGa Dances Again Atop Hot 100". [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-01-15. [dostęp 2009-01-15].

Cohen, Jonathan: "Lady GaGa Leads Hot 100 Amid Static Top 5". [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-01-22. [dostęp 2009-01-22].

Pietroluongo, Silvio: "Kelly Clarkson Breaks Record For Hot 100 Jump". [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-01-28. [dostęp 2009-01-28].

Hasty, Katy: "'Life' Is Good For Clarkson Atop Hot 100". [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-02-05. [dostęp 2009-02-05].

Pietroluongo, Silvio: "Eminem's 'Bottle' Breaks Digital Record". [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-02-11. [dostęp 2009-02-11].

Pietroluongo, Silvio: "Flo Rida Topples Single-Week Download Mark". [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-02-18. [dostęp 2009-02-18].

Caulfield, Keith: "Miley Cyrus' 'Climb' Debuts High on Hot 100". [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-03-12. [dostęp 2009-03-12].

Ben-Yehuda, Ayala: "Flo Rida Is Doubly Sweet On The Hot 100". [w:] Billboard [on-line]. Nielsen Business Media Inc., 2009-03-26. [dostęp 2009-03-27].

Pietroluongo, Silvio: "Lady GaGa Draws A Pair Of No. 1s". [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-04-01. [dostęp 2009-04-01].

Pietroluongo, Silvio: Black Eyed Peas Score First No. 1 On Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-04-08. [dostęp 2009-04-08].

Ayala Ben-Yehuda, Keith Caulfield: Black Eyed Peas, Lady GaGa Top Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-04-08. [dostęp 2009-04-10].

Ayala Ben-Yehuda, Keith Caulfield: 'Hannah Montana' Boosts Six Songs Into Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-04-16. [dostęp 2009-04-16].

Silvio Pietroluongo, Keith Caulfield: Eminem, Green Day Make Big Hot 100 Debuts. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-04-23. [dostęp 2009-04-23].

Ayala Ben-Yehuda, Keith Caulfield: Flo Rida Has Sweet Week On Billboard Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-04-30. [dostęp 2009-04-30].

Ayala Ben-Yehuda: 3OH!3 Hits Top Ten On Billboard Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-05-07. [dostęp 2009-05-07].

Ayala Ben-Yehuda: Daughtry Debuts High On Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-05-14. [dostęp 2009-05-14].

Gary Trust: Pitbull, Jeremih Hit Top Ten On Billboard Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-05-21. [dostęp 2009-05-21].

Black Eyed Peas – Boom Boom Pow. [w:] Billboard [on-line]. Nielsen Business Media, Inc., 2009-06-06. [dostęp 2009-06-05].

Ayala Ben-Yehuda: Lady GaGa Takes Two Top 10 Spots On Billboard's Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-06-04. [dostęp 2009-06-04].

Ayala Ben-Yehuda: The Black Eyed Peas Snag Top Spot On Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-06-11. [dostęp 2009-06-13].

Keith Caulfield: Black Eyed Peas 'E.N.D.' Up At No. 1 On Billboard 200. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-06-17. [dostęp 2009-06-17].

Ayala Ben-Yehuda: Drake Flies Twice Into Top 10 Of Billboard Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-06-25.

Chart Beat Bonus, "'Feeling' Like The Second Time". [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-07-02.

Ayala Ben-Yehuda: Colbie Caillat, Ting Tings Shake Up Billboard Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-07-09. [zarchiwizowane z tego adresu (2012-05-25)].

Ayala Ben-Yehuda: Hannah Montana, Mariah Carey Debut High On Billboard Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-07-16.

Taylor Swift, Shakira Make Moves On Billboard Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-07-23.

Black Eyed Peas Set Billboard Hot 100 Record. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-07-30.

T.I., Jay Sean Post High Debuts On Billboard Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-08-06.

Black Eyed Peas, Jason Mraz Tie Records On Billboard Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-08-13.

Black Eyed Peas, Jason Mraz Streak To Hot 100 Records. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-08-19.

Black Eyed Peas Hold Top Spot On Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-08-27.

Pearl Jam Posts Week's Highest Hot 100 Debut, Peas Stay On Top. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-09-03.

Mariah Carey Returns To Hot 100 Top 10. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-09-10.

'Glee' Songs Liven Up Billboard Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-09-17.

Chart Beat Thursday: Live-Blogging The Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-09-24.

Chart Beat Thursday: Black Eyed Peas, Pearl Jam, Frank Sinatra. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-10-01.

'Jay Sean Sends Peas Packing From Hot 100 Penthouse. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-10-07.

"3" To 1: Britney Beats Odds To Debut Atop Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-10-14.

Jay Sean Recaptures Hot 100's Top Slot | Billboard.com

Billboard – Music Charts, News, Photos & Video | Billboard [online], billboard.com [dostęp 2017-12-03].

DeRulo Tops Hot 100, But Swift Swoops In With Record-Breaking Debut Sum | Billboard.com

Billboard – Music Charts, News, Photos & Video | Billboard [online], billboard.com [dostęp 2017-12-03].

Jay-Z, Alicia Keys Lock Up Fourth Week Atop Hot 100

'Empire State' Stays Put On Hot 100 For A Fifth Week

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Ben-Yehuda, Ayala: Flo Rida, T.I. Hold Their Billboard Hot 100 Spots. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-02-26. [dostęp 2009-02-26].

Ben-Yehuda, Ayala: Soulja Boy Climbs Hot 100. [w:] Billboard [on-line]. Nielsen Business Media, Inc, 2009-03-05. [dostęp 2009-03-04].

Single numer jeden w roku 2009 (USA) (Polish Wikipedia)

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