Hansen, V., & Curtis, K. R. (2010). Voyages in world history (Instructor's edition.). Wadsworth/Cengage Learning.
Cita Chicago (17th ed.)Hansen, Valerie, i Kenneth Robert Curtis. Voyages in World History. Instructor's edition. Australia: Wadsworth/Cengage Learning, 2010.
Cita MLA (9th ed.)Hansen, Valerie, i Kenneth Robert Curtis. Voyages in World History. Instructor's edition. Wadsworth/Cengage Learning, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.