APA (7th ed.) Citation

Lewis, E. -. (1954). Medieval political ideas. Routledge & Kegan Paul.

Chicago Style (17th ed.) Citation

Lewis, Ewart -1968. Medieval Political Ideas. London: Routledge & Kegan Paul, 1954.

MLA (9th ed.) Citation

Lewis, Ewart -1968. Medieval Political Ideas. Routledge & Kegan Paul, 1954.

Warning: These citations may not always be 100% accurate.