APA (7th ed.) Citation

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 (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.