Hickman. Unmodern Philosophy and Modern Philosophy. Southern Illinois University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHickman. Unmodern Philosophy and Modern Philosophy. Southern Illinois University Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHickman. Unmodern Philosophy and Modern Philosophy. Southern Illinois University Press.
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