Ullmann, W. (1972). A short history of the papacy in the Middle Ages. Methuen & Co.
Cita Chicago Style (17a ed.)Ullmann, Walter. A Short History of the Papacy in the Middle Ages. [London]: Methuen & Co, 1972.
Cita MLA (8a ed.)Ullmann, Walter. A Short History of the Papacy in the Middle Ages. Methuen & Co, 1972.
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