Oorspronklik: Dark Blue Sheet Music by No Doubt. Gwen Renée Stefani , Tom Dumont. No Doubt. Hal Leonard , Universal. English. 0-7692-9769-2.
Vertaling: Geen twyfel. Gwen Stefani Renée, Tom Dumont. Hal Leonard, Universal. Engels. Solero. Guitar Tab. Bas. Vocal.