APA (7th ed.) Citation

Ullmann, W. (1966). Principles of government and politics in the Middle Ages (2nd ed.). Methuen.

Chicago Style (17th ed.) Citation

Ullmann, Walter. Principles of Government and Politics in the Middle Ages. 2nd ed. London: Methuen, 1966.

MLA (8th ed.) Citation

Ullmann, Walter. Principles of Government and Politics in the Middle Ages. 2nd ed. Methuen, 1966.

Warning: These citations may not always be 100% accurate.