Cita APA (7a ed.)

Bird, J. L., Peters, E., & Powell, J. M. (2013). Crusade and Christendom: Annotated documents in translation from Innocent III to the fall of Acre, 1187-1291. University of Pennsylvania Press.

Cita Chicago Style (17a ed.)

Bird, Jessalynn Lea, Edward Peters, y James M. Powell. Crusade and Christendom: Annotated Documents in Translation from Innocent III to the Fall of Acre, 1187-1291. Philadelphia: University of Pennsylvania Press, 2013.

Cita MLA (9a ed.)

Bird, Jessalynn Lea, et al. Crusade and Christendom: Annotated Documents in Translation from Innocent III to the Fall of Acre, 1187-1291. University of Pennsylvania Press, 2013.