APA引文

Booker, C. M. (2009). Past convictions: The penance of Louis the Pious and the decline of the Carolingians. University of Pennsylvania Press.

芝加哥风格引文

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

MLA引文

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

警告:这些引文格式不一定是100%准确.