Cita APA

Ullmann, W. 1. (1965). A history of political thought: The middle ages. Harmondsworth, Middlesex: Penguin Books.

Citación estilo Chicago

Ullmann, Walter 1910-1983. A History of Political Thought: The Middle Ages. Harmondsworth, Middlesex: Penguin Books, 1965.

Cita MLA

Ullmann, Walter 1910-1983. A History of Political Thought: The Middle Ages. Harmondsworth, Middlesex: Penguin Books, 1965.