Cita APA (7th ed.)

Duignan, B. (2011). Medieval philosophy: From 500 to 1500 CE. Britannica Educational Publishing.

Cita Chicago (17th ed.)

Duignan, Brian. Medieval Philosophy: From 500 to 1500 CE. New York: Britannica Educational Publishing, 2011.

Cita MLA (9th ed.)

Duignan, Brian. Medieval Philosophy: From 500 to 1500 CE. Britannica Educational Publishing, 2011.