Obrinsky, M. (1983). Profit theory and capitalism. University of Pennsylvania Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रObrinsky, Mark. Profit Theory and Capitalism. Philadelphia: University of Pennsylvania Press, 1983.
एमएलए (9वां संस्करण) प्रशस्ति पत्रObrinsky, Mark. Profit Theory and Capitalism. University of Pennsylvania Press, 1983.
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