Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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