APA (7th ed.) Citation

O'Sullivan, J. F., & Burns, J. F. (1943). Medieval Europe. F.S. Crofts & Co..

Chicago Style (17th ed.) Citation

O'Sullivan, Jeremiah Francis, and John Francis Burns. Medieval Europe. New York: F.S. Crofts & Co., 1943.

MLA (9th ed.) Citation

O'Sullivan, Jeremiah Francis, and John Francis Burns. Medieval Europe. F.S. Crofts & Co., 1943.