APA ציטוט

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

Chicago Style (17th ed.) Citation

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

ציטוט MLA

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