APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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