Plantinga, A. (1993). Warrant and proper function. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Plantinga, Alvin. Warrant and Proper Function. New York: Oxford University Press, 1993.
Lua MLA (9ú heag.)Plantinga, Alvin. Warrant and Proper Function. Oxford University Press, 1993.
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