Cornwell, R. D. (1969). World history in the twentieth century. Longman.
シカゴスタイル引用形Cornwell, R. D. World History in the Twentieth Century. London: Longman, 1969.
MLA引用形式Cornwell, R. D. World History in the Twentieth Century. Longman, 1969.
警告: この引用は必ずしも正確ではありません.