Cita APA (7a ed.)

Kaplan, M. A. (1967). System and process in international politics (2nd printing.). John Wiley & Sons.

Cita Chicago Style (17a ed.)

Kaplan, Morton A. System and Process in International Politics. 2nd printing. New York [etc.]: John Wiley & Sons, 1967.

Cita MLA (9a ed.)

Kaplan, Morton A. System and Process in International Politics. 2nd printing. John Wiley & Sons, 1967.