<Li> Jump up ^ Jaclyn Ward . "The Irish Charts - All there is to know". Irishcharts.ie . Retrieved 23 June 2012 . </Li> <Li> Jump up ^ "Hit Parade Italia - Indice per Interprete: P". Hitparadeitalia.it . Retrieved 23 June 2012 . </Li> <Li> Jump up ^ Steffen Hung . "Pet Shop Boys - Opportunities (Let's Make Lots Of Money)". charts.org.nz . Retrieved 23 June 2012 . </Li> <Li> Jump up ^ Salaverri, Fernando (September 2005). Sólo éxitos: año a año, 1959--2002 (1st ed .). Spain: Fundación Autor - SGAE . ISBN 84 - 8048 - 639 - 2 . </Li>

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