(en) B. Hoskyns, Trampled Under Foot: The Power and Excess of Led Zeppelin, Faber & Faber, (ISBN978-0-571-25936-6, lire en ligne), p. 168
(en) Gavin Edwards, Is Tiny Dancer Really Elton's Little John?: Music's Most Enduring Mysteries, Myths, and Rumors Revealed, Crown, (ISBN978-0-307-49623-2, lire en ligne)