Däniken, E. v., & Heron, M. (2017). Chariots of the gods?: Unsolved mysteries of the past. Souvenir.
Lua i Stíl Chicago (17ú heag.)Däniken, Erich von, agus Michael Heron. Chariots of the Gods?: Unsolved Mysteries of the Past. London: Souvenir, 2017.
Lua MLA (9ú heag.)Däniken, Erich von, agus Michael Heron. Chariots of the Gods?: Unsolved Mysteries of the Past. Souvenir, 2017.
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