Cita APA (7a ed.)

Moorhead, J. (2005). Gregory the Great (1st published.). Routledge.

Cita Chicago Style (17a ed.)

Moorhead, John. Gregory the Great. 1st published. London ; New York: Routledge, 2005.

Cita MLA (9a ed.)

Moorhead, John. Gregory the Great. 1st published. Routledge, 2005.