Cita APA (7a ed.)

Richards, J. (1980). Consul of God: The life and times of Gregory the Great. Routledge & Kegan Paul.

Cita Chicago Style (17a ed.)

Richards, Jeffrey. Consul of God: The Life and Times of Gregory the Great. London ; Boston ; Henley: Routledge & Kegan Paul, 1980.

Cita MLA (9a ed.)

Richards, Jeffrey. Consul of God: The Life and Times of Gregory the Great. Routledge & Kegan Paul, 1980.