Gaya APA

Keeton, W, T., Benasodoun, P, D. (1972). Biological Science (Ed. 2). New York: W. W. Norton &Company.

Gaya MLA

Keeton, William, T.., Benasodoun, Paula, Disanto. "Biological Science". Ed. 2 New York: W. W. Norton &Company, 1972. Text.