APA (7th ed.) Citation

Lewis, E. (1954). Medieval political ideas: Volume 1. Routledge.

Chicago Style (17th ed.) Citation

Lewis, Ewart. Medieval Political Ideas: Volume 1. Oxfordshire, England ; New York: Routledge, 1954.

MLA (9th ed.) Citation

Lewis, Ewart. Medieval Political Ideas: Volume 1. Routledge, 1954.