Dyfyniad APA

Duiker, W. J. (2010). Contemporary world history (5th ed.). Wadsworth, Cengage Learning.

Dyfyniad Arddull Chicago

Duiker, William J. Contemporary World History. 5th ed. Boston: Wadsworth, Cengage Learning, 2010.

Dyfyniad MLA

Duiker, William J. Contemporary World History. 5th ed. Wadsworth, Cengage Learning, 2010.

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