心聲 (歌曲)
參考來源

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1 2   "Christina Aguilera Chart History (Adult Contemporary)". Billboard.  [2013-07-30].（英語）.
1 2  "Christina Aguilera Chart History (Adult Pop Songs)". Billboard.   [2013-07-30].（英語）.
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1 2  Knowles, Julia (director). Stripped Live in the U.K.（英语：） (2004). RCA Records
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1 2  Andrew G（英语：） (host) and James Mathison（英语：） (host).  (television product)使用|format=需要含有|url= (帮助). Sydney Opera House: Network Ten. October 3, 2005.
1 2  Ryan Seacrest (host).  (television product)使用|format=需要含有|url= (帮助). Kodak Theater: Fox Broadcasting Company. March 28, 2006.
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↑   (compact disc). G.E.M. Hong Kong: Hummingbird Music. 2010.
↑  Fletcher, Alex. . Digital Spy (Hearst Corporation). April 12, 2010  [July 30, 2013]. （原始内容存档于2015-09-25）.
1 2 3  Fitzmaurice, Sarah. . Daily Mail (London: Associated Newspapers（英语：）). May 26, 2012  [July 30, 2013]. （原始内容存档于2020-07-09）.
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↑   (CD single liner notes). Christina Aguilera. New York City: RCA Records, a division of Sony Music Entertainment. 2003. 8287657432-2.
↑   (CD single liner notes). Christina Aguilera. New York City: RCA Records, a division of Sony Music Entertainment. 2003. 82876 58829 2.
↑   (DVD single liner notes). Christina Aguilera. New York City: RCA Records, a division of Sony Music Entertainment. 2003. 82876 57819.
↑   (Maxi single liner notes). Christina Aguilera. New York City: RCA Records, a division of Sony Music Entertainment. 2003. 82876 572342.
↑   (12"（英语：） liner notes). Christina Aguilera. New York City: RCA Records, a division of Sony Music Entertainment. 2003. 82876 58429 1.
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