Walldorf. To Shape Our World for Good. Cornell University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWalldorf. To Shape Our World for Good. Cornell University Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWalldorf. To Shape Our World for Good. Cornell University Press.
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