Composer: Jimmy Page & Robert Plant
Lyricist: Jimmy Page & Robert Plant
Composer: Bill Ward & Black Sabbath & John Osbourne & Ozzy Osbourne & Terence "Geezer" Butler & Terence Butler & Tony Iommi
Lyricist: A. Iommi & Butler & Iommi & J. Osbourne & Osborne & T. Butler & W. Ward & Ward