APA (7e ed.) Bronvermelding

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.

Chicago (17e ed.) Bronvermelding

Friend, 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.

MLA (8e ed.) Bronvermelding

Friend, 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.