Cita APA (7a ed.)

Booker, C. M. (2009). Past Convictions: The Penance of Louis the Pious and the Decline of the Carolingians. University of Pennsylvania Press.

Cita Chicago Style (17a ed.)

Booker, Courtney M. Past Convictions: The Penance of Louis the Pious and the Decline of the Carolingians. Philadelphia: University of Pennsylvania Press, 2009.

Cita MLA (8a ed.)

Booker, Courtney M. Past Convictions: The Penance of Louis the Pious and the Decline of the Carolingians. University of Pennsylvania Press, 2009.