Warburton, N. (2013). Philosophy: The basics (5th ed.). Routledge.
Lua i Stíl Chicago (17ú heag.)Warburton, Nigel. Philosophy: The Basics. 5th ed. London ; New York: Routledge, 2013.
Lua MLA (8ú heag.)Warburton, Nigel. Philosophy: The Basics. 5th ed. Routledge, 2013.
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