Dyfyniad APA

Greaves, R. L., & Zaller, R. (1997). Civilizations of the world: The human adventure. (3rd.ed.). Longman.

Dyfyniad Arddull Chicago

Greaves, Richard L., and Robert Zaller. Civilizations of the World: The Human Adventure. 3rd.ed. New York: Longman, 1997.

Dyfyniad MLA

Greaves, Richard L., and Robert Zaller. Civilizations of the World: The Human Adventure. 3rd.ed. Longman, 1997.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.