Ullmann, W. (1988). Law and Jurisdiction in the Middle Ages. [publisher not identified].
芝加哥风格引文Ullmann, Walter. Law and Jurisdiction in the Middle Ages. London: [publisher not identified], 1988.
MLA引文Ullmann, Walter. Law and Jurisdiction in the Middle Ages. [publisher not identified], 1988.
警告：这些引文格式不一定是100％准确.