Dales, R. C. (1973). The scientific achievement of the Middle Ages. Philadelphia: University of Pennsylvania Press.
シカゴスタイル引用形Dales, Richard C. The Scientific Achievement of the Middle Ages. Philadelphia: University of Pennsylvania Press, 1973.
MLA引用形式Dales, Richard C. The Scientific Achievement of the Middle Ages. Philadelphia: University of Pennsylvania Press, 1973.
警告: この引用は必ずしも正確ではありません.