Perry, M. (2011). Western civilization: A brief history (7th ed., International ed.). Wadsworth/Cengage Learning.
Chicago-viite (17. p.)Perry, Marvin. Western Civilization: A Brief History. 7th ed., International ed. Australia: Wadsworth/Cengage Learning, 2011.
MLA-viite (9. p.)Perry, Marvin. Western Civilization: A Brief History. 7th ed., International ed. Wadsworth/Cengage Learning, 2011.
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