Cita APA (7th ed.)

Perry, M., & Bock, G. W. (2012). Sources of the Western tradition (Eight edition.). Wadsworth/Cengage Learning.

Cita Chicago (17th ed.)

Perry, Marvin, i George W. Bock. Sources of the Western Tradition. Eight edition. Australia: Wadsworth/Cengage Learning, 2012.

Cita MLA (9th ed.)

Perry, Marvin, i George W. Bock. Sources of the Western Tradition. Eight edition. Wadsworth/Cengage Learning, 2012.