Powell, J. M. (1986). Anatomy of a crusade, 1213-1221. University of Pennsylvania Press.
芝加哥风格引文Powell, James M. Anatomy of a Crusade, 1213-1221. Philadelphia [Pa.]: University of Pennsylvania Press, 1986.
MLA引文Powell, James M. Anatomy of a Crusade, 1213-1221. University of Pennsylvania Press, 1986.
警告：这些引文格式不一定是100％准确.