Cita APA (7a ed.)

Burns, E. M., Ralph, P. L., Lerner, R. E., & Meacham, S. (1991). World civilizations: Their history and their culture (7th ed.). W.W. Norton.

Cita Chicago Style (17a ed.)

Burns, Edward McNall, Philip Lee Ralph, Robert E. Lerner, y Standish Meacham. World Civilizations: Their History and Their Culture. 7th ed. New York, N.Y. ; London: W.W. Norton, 1991.

Cita MLA (8a ed.)

Burns, Edward McNall, et al. World Civilizations: Their History and Their Culture. 7th ed. W.W. Norton, 1991.