Oorspronkelijk: 4 20 Sheet Music by Crosby, Stills, Nash & Young. Crosby, Stills, Nash & Young. Stephen Arthur Stills. Sony. English. Solero.
Vertaling: 4 20 bladmuziek van Crosby, Stills, Nash. Crosby, Stills, Nash. ATV Music Publishing. Engels. Plan. Vocal.