Forrás: 4 20 Sheet Music by Crosby, Stills, Nash & Young. Crosby, Stills, Nash & Young. Stephen Arthur Stills. Sony. English. Solero.
Fordítás: 4 20 Kotta által Crosby, Stills, Nash. Crosby, Stills, Nash. ATV Music Publishing. Angol. Terv. Magánhangzói.