Tohutoro APA (7th ed.)

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

Tohutoru Kātū Chicago (17th ed.)

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

Tohutoro MLA (9th ed.)

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