Não informado. (2001). Special studies. Utah Geological and Mineralogical Survey.
Chicago (17e ed.) BronvermeldingNão informado. Special Studies. Salt Lake City, Utah: Utah Geological and Mineralogical Survey, 2001.
MLA (8e ed.) BronvermeldingNão informado. Special Studies. Utah Geological and Mineralogical Survey, 2001.
Let op: Deze citaties zijn niet altijd 100% accuraat.