APA (7th ed.) Citation

Heinrichs, W. H. (1988). Threshold of war : Franklin D. Roosevelt and American entry into World War II / Waldo Heinrichs: Franklin D. Roosevelt and American entry into World War II. Oxford University Press.

Chicago Style (17th ed.) Citation

Heinrichs, Waldo H. Threshold of War : Franklin D. Roosevelt and American Entry into World War II / Waldo Heinrichs: Franklin D. Roosevelt and American Entry into World War II. New York ; Oxford: Oxford University Press, 1988.

MLA (9th ed.) Citation

Heinrichs, Waldo H. Threshold of War : Franklin D. Roosevelt and American Entry into World War II / Waldo Heinrichs: Franklin D. Roosevelt and American Entry into World War II. Oxford University Press, 1988.

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