(1964). Defenders: The magazine of defenders of wildlife. Washington, D C : Defenders of Wildlife.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDefenders: The Magazine of Defenders of Wildlife. Washington, D C : Defenders of Wildlife, 1964.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDefenders: The Magazine of Defenders of Wildlife. Washington, D C : Defenders of Wildlife, 1964.
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