Downes, M. C. (1971). Regional situation report- Papua New Guinea ; Management of the crocodile industry in Papua New Guinea.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDownes, M. C. Regional Situation Report- Papua New Guinea ; Management of the Crocodile Industry in Papua New Guinea. 1971.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDownes, M. C. Regional Situation Report- Papua New Guinea ; Management of the Crocodile Industry in Papua New Guinea. 1971.
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