APA-referens (7:e uppl.)

Keeton, W. T. (1973). Elements of biological science (2d ed.). Norton National Book Store.

Chicago-referens (17:e uppl.)

Keeton, William T. Elements of Biological Science. 2d ed. New York, Manila: Norton National Book Store, 1973.

MLA-referens (9:e uppl.)

Keeton, William T. Elements of Biological Science. 2d ed. Norton National Book Store, 1973.