APA-Zitierstil (7. Ausg.)

Ullmann, W. (1968). A history of political thought: The Middle Ages (Repr.). Penguin Books.

Chicago-Zitierstil (17. Ausg.)

Ullmann, Walter. A History of Political Thought: The Middle Ages. Repr. Harmondsworth: Penguin Books, 1968.

MLA-Zitierstil (9. Ausg.)

Ullmann, Walter. A History of Political Thought: The Middle Ages. Repr. Penguin Books, 1968.