Izvornik: Testify by The Simpsons. Voice 1, range. D4-F5. Frank Mula. - Digital Sheet Music. Piano. Vocal. Guitar. Voice 2.
Prijevod: Svjedoče Simpsona. Glas 1, raspon. - Digitalni Sheet Music. iz Twentieth Century Fox Television Series The Simpsons. Plan. Vokalni.
