APA引文

Heer, F. (1962). The medieval world: Europe. New American Library.

Chicago Style (17th ed.) Citation

Heer, Friedrich. The Medieval World: Europe. New York: New American Library, 1962.

MLA引文

Heer, Friedrich. The Medieval World: Europe. New American Library, 1962.

警告：這些引文格式不一定是100％准確.