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