Cita APA (7a ed.)

Duiker, W. J., & Spielvogel, J. J. (2019). World history (Ninth edition.). Wadsworth Cengage Learning.

Cita Chicago Style (17a ed.)

Duiker, William J., y Jackson J. Spielvogel. World History. Ninth edition. Australia: Wadsworth Cengage Learning, 2019.

Cita MLA (9a ed.)

Duiker, William J., y Jackson J. Spielvogel. World History. Ninth edition. Wadsworth Cengage Learning, 2019.