Kurtz, P. (1966). American philosophy in the twentieth century. The Macmillan.
Dyfyniad Arddull ChicagoKurtz, Paul. American Philosophy in the Twentieth Century. New York: The Macmillan, 1966.
Dyfyniad MLAKurtz, Paul. American Philosophy in the Twentieth Century. The Macmillan, 1966.
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