Dyfyniad APA

Duiker, W. J. (2015). Contemporary world history (Sixth edition.). Cengage Learning.

Dyfyniad Arddull Chicago

Duiker, William J. Contemporary World History. Sixth edition. Stamford, Conn: Cengage Learning, 2015.

Dyfyniad MLA

Duiker, William J. Contemporary World History. Sixth edition. Cengage Learning, 2015.

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