Spielvogel, J. J. (1994). Western civilization (2nd.ed.). West Publishing Company.
Lua i Stíl Chicago (17ú heag.)Spielvogel, Jackson J. Western Civilization. 2nd.ed. Minneapolis / St paul: West Publishing Company, 1994.
Lua MLA (9ú heag.)Spielvogel, Jackson J. Western Civilization. 2nd.ed. West Publishing Company, 1994.
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