(en) Mayfield Geoff, « 1999 The Year in Music Totally '90s: Diary of a Decade - The Listing of Top Pop Albums of the '90s & Hot 100 Singles of the '90s », Billboard, vol. 111, no 52, (ISSN0006-2510, lire en ligne)
(en) « The Year in Music - Hot 100 Singles », Billboard, vol. 107, no 52, (ISSN0006-2510)
(en) « The Year in Music - Hot 100 Singles », Billboard, vol. 108, no 52, (ISSN0006-2510, lire en ligne)
(en) Mayfield Geoff, « 1999 The Year in Music Totally '90s: Diary of a Decade - The Listing of Top Pop Albums of the '90s & Hot 100 Singles of the '90s », Billboard, vol. 111, no 52, (ISSN0006-2510, lire en ligne)