Não informado. (2001). Special paper. Department of Natural Resources.
Chicago (17e ed.) BronvermeldingNão informado. Special Paper. Québec, Canadá: Department of Natural Resources, 2001.
MLA (8e ed.) BronvermeldingNão informado. Special Paper. Department of Natural Resources, 2001.
Let op: Deze citaties zijn niet altijd 100% accuraat.