Dyfyniad APA

Allen, J. M. (1997). Study guide for Ralph, Lerner, Meacham, Wood, Hull, and Burns "World civilizations" (9th ed.). New York ; London: W. W. Norton.

Dyfyniad Arddull Chicago

Allen, J. Michael. Study Guide for Ralph, Lerner, Meacham, Wood, Hull, and Burns "World Civilizations". 9th ed. New York ; London: W. W. Norton, 1997.

Dyfyniad MLA

Allen, J. Michael. Study Guide for Ralph, Lerner, Meacham, Wood, Hull, and Burns "World Civilizations". 9th ed. New York ; London: W. W. Norton, 1997.

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