Ryder. State Wildlife Management and Conservation. Johns Hopkins University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRyder. State Wildlife Management and Conservation. Johns Hopkins University Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRyder. State Wildlife Management and Conservation. Johns Hopkins University Press.
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