Cita APA

Pfaltzgraff, R. L. (1972). Politics and the international system (2d ed.). Lippincott.

Citación estilo Chicago

Pfaltzgraff, Robert L. Politics and the International System. 2d ed. Philadelphia: Lippincott, 1972.

Cita MLA

Pfaltzgraff, Robert L. Politics and the International System. 2d ed. Lippincott, 1972.

Warning: These citations may not always be 100% accurate.