Gaya APA

Keeton, W, T., Bensadoun, P, D, S. (1980). Biological Science (Ed. 3). New York: W. W. Norton & Company.

Gaya MLA

Keeton, William, T.., Bensadoun, Paula, Di, Santo. "Biological Science". Ed. 3 New York: W. W. Norton & Company, 1980. Text.