Ullmann, W. (2019). The Individual and Society in the Middle Ages. Johns Hopkins University Press.
芝加哥风格引文Ullmann, Walter. The Individual and Society in the Middle Ages. Johns Hopkins University Press, 2019.
MLA引文Ullmann, Walter. The Individual and Society in the Middle Ages. Johns Hopkins University Press, 2019.
警告：这些引文格式不一定是100％准确.