APA (7. basım) Alıntı

Keeton, W. T. (1972). Elements of biological science (2nd ed.). W.W. Norton.

Chicago Style (17. basım) Atıf

Keeton, William T. Elements of Biological Science. 2nd ed. New York: W.W. Norton, 1972.

MLA (9th ed.) Atıf

Keeton, William T. Elements of Biological Science. 2nd ed. W.W. Norton, 1972.