Gaya APA

Simpson, G, G., Beck, W, S. (1977). Life : An Introduction to Biology (Shorter Edition). New York: Harcourt Brace Jovanovich.

Gaya MLA

Simpson, George, Gaylord., Beck, William, S.. "Life : An Introduction to Biology". Shorter Edition New York: Harcourt Brace Jovanovich, 1977. Text.