APA (7. basım) Alıntı

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

Chicago Style (17. basım) Atıf

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

MLA (9th ed.) Atıf

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