APA (7 ম সংস্করণ) উদ্ধৃতি

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

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

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

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

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