Cita APA (7th ed.)

Spielvogel, J. J. (2015). Western civilization (Ninth edition.). Cengage Learning.

Cita Chicago (17th ed.)

Spielvogel, Jackson J. Western Civilization. Ninth edition. Stamford, CT: Cengage Learning, 2015.

Cita MLA (9th ed.)

Spielvogel, Jackson J. Western Civilization. Ninth edition. Cengage Learning, 2015.