Evans, G. (1988). The thought of Gregory the Great Cambridge studies in medieval life and thought.
芝加哥风格引文Evans, Gillian. "The Thought of Gregory the Great." Cambridge Studies in Medieval Life and Thought 1988.
MLA引文Evans, Gillian. "The Thought of Gregory the Great." Cambridge Studies in Medieval Life and Thought, 1988.
警告：这些引文格式不一定是100％准确.
