APA (7th ed.) Citation

Knowles, D. (1962). The evolution of medieval thought. Helicon.

Chicago Style (17th ed.) Citation

Knowles, David. The Evolution of Medieval Thought. Baltimore [etc.]: Helicon, 1962.

MLA (9th ed.) Citation

Knowles, David. The Evolution of Medieval Thought. Helicon, 1962.

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