APA引文

Otto of Freising. (1953). The deeds of Frederick Barbarossa. New York: Columbia University Press.

Trích dẫn kiểu Chicago

Otto of Freising. The Deeds of Frederick Barbarossa. New York: Columbia University Press, 1953.

MLA引文

Otto of Freising. The Deeds of Frederick Barbarossa. New York: Columbia University Press, 1953.

警告：這些引文格式不一定是100％准確.