Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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