Cita APA (7a ed.)

(1986). Republic of St. Peter: The Birth of The Papal State, 680-825. University of Pennsylvania Press.

Cita Chicago Style (17a ed.)

Republic of St. Peter: The Birth of The Papal State, 680-825. University of Pennsylvania Press, 1986.

Cita MLA (8a ed.)

Republic of St. Peter: The Birth of The Papal State, 680-825. University of Pennsylvania Press, 1986.