APA (7th ed.) Zitazioa

National Geographic Society. (1979). Mysteries of the ancient world. National Geographic Society.

Chicago Style (17th ed.) Zitazioa

National Geographic Society. Mysteries of the Ancient World. Washington, D.C: National Geographic Society, 1979.

MLA (9th ed.) Zitazioa

National Geographic Society. Mysteries of the Ancient World. National Geographic Society, 1979.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.