Não informado. (2001). Short paper. Geological Survey of Sierra Leone.
Chicago (17e ed.) BronvermeldingNão informado. Short Paper. Freetown: Geological Survey of Sierra Leone, 2001.
MLA (8e ed.) BronvermeldingNão informado. Short Paper. Geological Survey of Sierra Leone, 2001.
Let op: Deze citaties zijn niet altijd 100% accuraat.