Ullmann, W. (1965). History of Political Thought: The Middle Ages. Penguin.
シカゴスタイル引用形Ullmann, Walter. History of Political Thought: The Middle Ages. England: Penguin, 1965.
MLA引用形式Ullmann, Walter. History of Political Thought: The Middle Ages. Penguin, 1965.
警告: この引用は必ずしも正確ではありません.