Swain, . J. E. (1947). A history of world civilization. (2nd ed.). McGraw-Hill,.
Chicago-čujuhus (17. p.)Swain, James Edgar. A History of World Civilization. 2nd ed. New York,: McGraw-Hill,, 1947.
MLA-čujuhus (9. p.)Swain, James Edgar. A History of World Civilization. 2nd ed. McGraw-Hill,, 1947.
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