Kelley, D. (1990). The art of reasoning (Expanded ed., with symbolic logic.). New York: W.W. Norton.
Παραπομπή Chicago StyleKelley, David. The Art of Reasoning. Expanded ed., with symbolic logic. New York: W.W. Norton, 1990.
Παραπομπή MLAKelley, David. The Art of Reasoning. Expanded ed., with symbolic logic. New York: W.W. Norton, 1990.
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