Cita APA

Spykman, N. J. (1942). America's strategy in world politics, the United States and the balance of power. Harcourt, Brace and Company.

Citación estilo Chicago

Spykman, Nicholas John. America's Strategy in World Politics, the United States and the Balance of Power. New York: Harcourt, Brace and Company, 1942.

Cita MLA

Spykman, Nicholas John. America's Strategy in World Politics, the United States and the Balance of Power. Harcourt, Brace and Company, 1942.