Cita APA (7a ed.)

Powell, J. M., Peters, E., & Bird, J. L. (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.)

Powell, James M., Edward Peters, y Jessalynn L. Bird. 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 (8a ed.)

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