APA引文

Emerton, E. (1990). The correspondence of Pope Gregory VII: Selected letters from the registrum. Columbia Univ..

芝加哥风格引文

Emerton, Ephraim. The Correspondence of Pope Gregory VII: Selected Letters from the Registrum. New York: Columbia Univ., 1990.

MLA引文

Emerton, Ephraim. The Correspondence of Pope Gregory VII: Selected Letters from the Registrum. Columbia Univ., 1990.

警告：这些引文格式不一定是100％准确.