APA (7th ed.) Citation
Ullmann, W. (1966). Principles of government and politics in the Middle Ages (2 ed.). Methuen.
Chicago Style (17th ed.) Citation
Ullmann, Walter. Principles of Government and Politics in the Middle Ages. 2 ed. London: Methuen, 1966.
MLA (9th ed.) Citation
Ullmann, Walter. Principles of Government and Politics in the Middle Ages. 2 ed. Methuen, 1966.
Warning: These citations may not always be 100% accurate.