APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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