APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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