| 圖書| 1. | Morris, Colin(1991)。The Papal Monarchy: The Western Church from 1050 to 1250。Clarendon Press。   | | 2. | Berman, Harold Joseph(1983)。Law and Revolution: The Formation of the Western Legal Tradition。Harvard University Press。 | | 3. | (1993)。The Western Church from the Tenth to the Early Twelfth Century。The Western Church from the Tenth to the Early Twelfth Century。Cambridge。 | |