Cita APA (7th ed.)

Kaplan, M. A. (1957). System and process in international politics. John Wiley & Sons.

Cita Chicago (17th ed.)

Kaplan, Morton A. System and Process in International Politics. New York: John Wiley & Sons, 1957.

Cita MLA (9th ed.)

Kaplan, Morton A. System and Process in International Politics. John Wiley & Sons, 1957.