APA (7th ed.) Zitazioa

Levy ,Charles Kingsley. (1979). Biology: Human perspectives. Goodyear.

Chicago Style (17th ed.) Zitazioa

Levy ,Charles Kingsley. Biology: Human Perspectives. Santa Monica, California: Goodyear, 1979.

MLA (9th ed.) Zitazioa

Levy ,Charles Kingsley. Biology: Human Perspectives. Goodyear, 1979.