Cita APA (7a ed.)

Dales, R. C. (1973). The Scientific Achievement of the Middle Ages. University of Pennsylvania Press.

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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