Perry, M., & Bock, G. W. (2016). Western civilization: A brief history (Eleventh edition.). Wadsworth Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Perry, Marvin, agus George W. Bock. Western Civilization: A Brief History. Eleventh edition. Australia: Wadsworth Cengage Learning, 2016.
Lua MLA (9ú heag.)Perry, Marvin, agus George W. Bock. Western Civilization: A Brief History. Eleventh edition. Wadsworth Cengage Learning, 2016.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.