Drescher, S., & Engerman, S. L. (1998). A Historical guide to world slavery. Oxford University Press.
Chicago Style aipamenaDrescher, Seymour, and Stanley L. Engerman. A Historical Guide to World Slavery. New York: Oxford University Press, 1998.
MLA aipamenaDrescher, Seymour, and Stanley L. Engerman. A Historical Guide to World Slavery. Oxford University Press, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.