Powell, J. (1975). Agricultural traditions of the Mount Hagen area. University of Papua New Guinea, Dept. of Geography.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPowell, Jocelyn. Agricultural Traditions of the Mount Hagen Area. [Port Moresby]: University of Papua New Guinea, Dept. of Geography, 1975.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPowell, Jocelyn. Agricultural Traditions of the Mount Hagen Area. University of Papua New Guinea, Dept. of Geography, 1975.
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