APA (7th ed.) Citation

Johnston, R. A. (2011). All things medieval: An encyclopedia of the medieval world. Greenwood.

Chicago Style (17th ed.) Citation

Johnston, Ruth A. All Things Medieval: An Encyclopedia of the Medieval World. Santa Barbara, Calif.: Greenwood, 2011.

MLA (9th ed.) Citation

Johnston, Ruth A. All Things Medieval: An Encyclopedia of the Medieval World. Greenwood, 2011.