APA (7th ed.) Citation

Ullmann, W. (1976). The Papacy and political ideas in the Middle Ages. Variorum Reprints.

Chicago Style (17th ed.) Citation

Ullmann, Walter. The Papacy and Political Ideas in the Middle Ages. London: Variorum Reprints, 1976.

MLA (9th ed.) Citation

Ullmann, Walter. The Papacy and Political Ideas in the Middle Ages. Variorum Reprints, 1976.

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