APA (7th ed.) Citation

Bullock, A. (1962). Hitler: A study in tyranny. Penguin.

Chicago Style (17th ed.) Citation

Bullock, Alan. Hitler: A Study in Tyranny. Middlesex: Penguin, 1962.

MLA (9th ed.) Citation

Bullock, Alan. Hitler: A Study in Tyranny. Penguin, 1962.