Greenhood, D. (1971). Mapping (5th impression.). University of Chicago Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGreenhood, David. Mapping. 5th impression. Chicago: University of Chicago Press, 1971.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGreenhood, David. Mapping. 5th impression. University of Chicago Press, 1971.
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