Cita APA (7th ed.)

(1972). Man Threatened: The Nature of Man. McDougal, Littell Co..

Cita Chicago (17th ed.)

Man Threatened: The Nature of Man. Illinois: McDougal, Littell Co., 1972.

Cita MLA (9th ed.)

Man Threatened: The Nature of Man. McDougal, Littell Co., 1972.