Cita APA (7a ed.)

Keck, D. (1998). Angels & angelology in the Middle Ages. Oxford University Press.

Cita Chicago Style (17a ed.)

Keck, David. Angels & Angelology in the Middle Ages. New York: Oxford University Press, 1998.

Cita MLA (8a ed.)

Keck, David. Angels & Angelology in the Middle Ages. Oxford University Press, 1998.