Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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