Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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