Cita APA (7th ed.)

Keeton, W. T. (1980). Biological Science. Norton & Company.

Cita Chicago (17th ed.)

Keeton, Willian T. Biological Science. New York: Norton & Company, 1980.

Cita MLA (9th ed.)

Keeton, Willian T. Biological Science. Norton & Company, 1980.