APA (7th ed.) Citation

Lopez, R. S. (1976). The commercial revolution of the Middle Ages, 950-1350.

Chicago Style (17th ed.) Citation

Lopez, Robert Sabatino. The Commercial Revolution of the Middle Ages, 950-1350. 1976.

MLA (9th ed.) Citation

Lopez, Robert Sabatino. The Commercial Revolution of the Middle Ages, 950-1350. 1976.

Warning: These citations may not always be 100% accurate.