Cropsey, J. (1977). Political philosophy and the issues of politics. University of Chicago Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCropsey, Joseph. Political Philosophy and the Issues of Politics. University of Chicago Press, 1977.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCropsey, Joseph. Political Philosophy and the Issues of Politics. University of Chicago Press, 1977.
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