APA citiranje

Dales, R. C. (1973). The scientific achievement of the Middle Ages. Philadelphia: University of Pennsylvania Press.

Trích dẫn kiểu Chicago

Dales, Richard C. The Scientific Achievement of the Middle Ages. Philadelphia: University of Pennsylvania Press, 1973.

MLA citiranje

Dales, Richard C. The Scientific Achievement of the Middle Ages. Philadelphia: University of Pennsylvania Press, 1973.