Friend, C. R. L. (1975). The geology and geochemistry of the preketilidain basement complex in the Ravns Storo area, Riskenaesset Region, Southern West Greenland. University of London.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFriend, Clark R. L. The Geology and Geochemistry of the Preketilidain Basement Complex in the Ravns Storo Area, Riskenaesset Region, Southern West Greenland. University of London, 1975.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFriend, Clark R. L. The Geology and Geochemistry of the Preketilidain Basement Complex in the Ravns Storo Area, Riskenaesset Region, Southern West Greenland. University of London, 1975.
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