Koch. The Impoverishment of the American College Student. Brookings Institution Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKoch. The Impoverishment of the American College Student. Brookings Institution Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKoch. The Impoverishment of the American College Student. Brookings Institution Press.
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