APA (7th ed.) Citation

Kleinhenz, C., Barker, J. W., Geiger, G., & Lansing, R. (2004). Medieval Italy: An encyclopedia. Routledge.

Chicago Style (17th ed.) Citation

Kleinhenz, Christopher, John W. Barker, Gail Geiger, and Richard Lansing. Medieval Italy: An Encyclopedia. New York London: Routledge, 2004.

MLA (9th ed.) Citation

Kleinhenz, Christopher, et al. Medieval Italy: An Encyclopedia. Routledge, 2004.