APA (7th ed.) Citation

Donaldson, G. A. (2003). American foreign policy: The twentieth century in documents. Longman.

Chicago Style (17th ed.) Citation

Donaldson, Gary A. American Foreign Policy: The Twentieth Century in Documents. New York [etc.]: Longman, 2003.

MLA (9th ed.) Citation

Donaldson, Gary A. American Foreign Policy: The Twentieth Century in Documents. Longman, 2003.

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