APA (7 ম সংস্করণ) উদ্ধৃতি

Ralph, P. L. (1997). World civilizations, their history and their culture (9th ed.). W.W. Norton.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Ralph, Philip Lee. World Civilizations, Their History and Their Culture. 9th ed. New York: W.W. Norton, 1997.

M.L.A (8 ম সংস্করণ) উদ্ধৃতি

Ralph, Philip Lee. World Civilizations, Their History and Their Culture. 9th ed. W.W. Norton, 1997.