Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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