Não informado. (2001). Rangelands. Society for Range Management.
Chicago (17e ed.) BronvermeldingNão informado. Rangelands. Denver, Colo: Society for Range Management, 2001.
MLA (8e ed.) BronvermeldingNão informado. Rangelands. Society for Range Management, 2001.
Let op: Deze citaties zijn niet altijd 100% accuraat.