APA aipamena

McClelland, C. A. (1966). Theory and the international system. New York: Macmillan.

Chicago Style aipamena

McClelland, Charles A. Theory and the International System. New York: Macmillan, 1966.

MLA aipamena

McClelland, Charles A. Theory and the International System. New York: Macmillan, 1966.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.