Cita APA

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

Citación estilo Chicago

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

Cita MLA

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