APA (7th ed.) Zitazioa
Grosvenor, M. B. National Geographic: Vol. 138, no. 1, July 1970. National Geographic Society.
Chicago Style (17th ed.) Zitazioa
Grosvenor, Melville Bell. National Geographic: Vol. 138, No. 1, July 1970. Washington, EUA: National Geographic Society.
MLA (9th ed.) Zitazioa
Grosvenor, Melville Bell. National Geographic: Vol. 138, No. 1, July 1970. National Geographic Society.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.