APA (7th ed.) Citation

Bullock, A. (1960). Hitler: A study in tyranny (Rev. ed.). Harper.

Chicago Style (17th ed.) Citation

Bullock, Alan. Hitler: A Study in Tyranny. Rev. ed. New York: Harper, 1960.

MLA (9th ed.) Citation

Bullock, Alan. Hitler: A Study in Tyranny. Rev. ed. Harper, 1960.