PHILOSOPHY & KLEMKE, E. (1986). Philosophy: The basic issuses.-- Ed.2. ST. Martin's Press.
Lua i Stíl Chicago (17ú heag.)PHILOSOPHY agus E.D KLEMKE. Philosophy: The Basic Issuses.-- Ed.2. New York: ST. Martin's Press, 1986.
Lua MLA (9ú heag.)PHILOSOPHY agus E.D KLEMKE. Philosophy: The Basic Issuses.-- Ed.2. ST. Martin's Press, 1986.
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