Cita APA (7a ed.)

Evans, G. R. (1988). The Thought of Gregory the Great. University Press.

Cita Chicago Style (17a ed.)

Evans, G. R. The Thought of Gregory the Great. Cambridge: University Press, 1988.

Cita MLA (9a ed.)

Evans, G. R. The Thought of Gregory the Great. University Press, 1988.