Cita APA (7th ed.)
Burns, E. M. (1986). World civilizations : Vol. 1: Their history and their culture (7th ed.). W.W. Norton and Co..
Cita Chicago (17th ed.)
Burns, Edward Mcnall. World Civilizations : Vol. 1: Their History and Their Culture. 7th ed. New York: W.W. Norton and Co., 1986.
Cita MLA (9th ed.)
Burns, Edward Mcnall. World Civilizations : Vol. 1: Their History and Their Culture. 7th ed. W.W. Norton and Co., 1986.
Atenció: Aquestes cites poden no estar 100% correctes.