Cita APA (7a ed.)

William J. Duiker. (2020). Contemporary World History, 7th Edition (seventh edition.). Cengage Learning.

Cita Chicago Style (17a ed.)

William J. Duiker. Contemporary World History, 7th Edition. seventh edition. United States of America: Cengage Learning, 2020.

Cita MLA (8a ed.)

William J. Duiker. Contemporary World History, 7th Edition. seventh edition. Cengage Learning, 2020.