Cita APA

Ullmann, W. 1. (1972). A short history of the papacy in the middle ages. London: Methuen & Co.

Citación estilo Chicago

Ullmann, Walter 1910-1983. A Short History of the Papacy in the Middle Ages. London: Methuen & Co, 1972.

Cita MLA

Ullmann, Walter 1910-1983. A Short History of the Papacy in the Middle Ages. London: Methuen & Co, 1972.