APA (7th ed.) Citation

Duffy, J. P. (1991). Hitler slept late and other blunders that cost him the war. Praeger.

Chicago Style (17th ed.) Citation

Duffy, James P. Hitler Slept Late and Other Blunders That Cost Him the War. New York: Praeger, 1991.

MLA (9th ed.) Citation

Duffy, James P. Hitler Slept Late and Other Blunders That Cost Him the War. Praeger, 1991.