APA(7版)引用形式
Ullmann, W. (1966). Principles of government and politics in the Middle Ages (2 ed.). Methuen.
Chicagoスタイル(17版)引用形式
Ullmann, Walter. Principles of Government and Politics in the Middle Ages. 2 ed. London: Methuen, 1966.
MLA(9版)引用形式
Ullmann, Walter. Principles of Government and Politics in the Middle Ages. 2 ed. Methuen, 1966.
警告: この引用は必ずしも正確ではありません.