APA (7th ed.) Zitazioa
Atteborough, D. (1979). Life on earth: A natural history. Little, Brown and Co..
Chicago Style (17th ed.) Zitazioa
Atteborough, David. Life on Earth: A Natural History. Boston: Little, Brown and Co., 1979.
MLA (9th ed.) Zitazioa
Atteborough, David. Life on Earth: A Natural History. Little, Brown and Co., 1979.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.