Tohutoro APA (7th ed.)
Heinrichs, W. H. (1989). Threshold of war: Franklin D. Roosevelt and American entry into World War II. Oxford University Press.
Tohutoru Kātū Chicago (17th ed.)
Heinrichs, Waldo H. Threshold of War: Franklin D. Roosevelt and American Entry into World War II. New York: Oxford University Press, 1989.
Tohutoro MLA (9th ed.)
Heinrichs, Waldo H. Threshold of War: Franklin D. Roosevelt and American Entry into World War II. Oxford University Press, 1989.
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