APA

Kaplan M. A., . (1957). System and process in international politics. New York: Wiley.

Chicago

Kaplan Morton A, . 1957. System and process in international politics. New York: Wiley.

Harvard

Kaplan M. A., . (1957). System and process in international politics. New York: Wiley.

MLA

Kaplan Morton A, . System and process in international politics. New York: Wiley. 1957.