Cita APA (7a ed.)

Colgrave, B. (1968). The Earliest Life of Gregory the Great. The University of Kansas Press.

Cita Chicago Style (17a ed.)

Colgrave, Bertram. The Earliest Life of Gregory the Great. Lawrence: The University of Kansas Press, 1968.

Cita MLA (9a ed.)

Colgrave, Bertram. The Earliest Life of Gregory the Great. The University of Kansas Press, 1968.