Perry, M. (2011). Western civilization: A brief history (7th ed., International ed.). Wadsworth/Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Perry, Marvin. Western Civilization: A Brief History. 7th ed., International ed. Australia: Wadsworth/Cengage Learning, 2011.
Lua MLA (9ú heag.)Perry, Marvin. Western Civilization: A Brief History. 7th ed., International ed. Wadsworth/Cengage Learning, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.