Butler, Mark (January 2003), "Taking it seriously: intertextuality and authenticity in two covers by the Pet Shop Boys", Popular Music, 22 (1), Cambridge University Press: 1–19, doi:10.1017/S0261143003003015, JSTOR853553, S2CID191514915
"Irish Singles Chart". The Irish Charts. Retrieved 23 November 2009. Note: U2 must be searched manually.
jstor.org
Butler, Mark (January 2003), "Taking it seriously: intertextuality and authenticity in two covers by the Pet Shop Boys", Popular Music, 22 (1), Cambridge University Press: 1–19, doi:10.1017/S0261143003003015, JSTOR853553, S2CID191514915
Butler, Mark (January 2003), "Taking it seriously: intertextuality and authenticity in two covers by the Pet Shop Boys", Popular Music, 22 (1), Cambridge University Press: 1–19, doi:10.1017/S0261143003003015, JSTOR853553, S2CID191514915