Ray. The Ecological Other. University of Arizona Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRay. The Ecological Other. University of Arizona Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRay. The Ecological Other. University of Arizona Press.
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