Não informado. (2000). Technical bulletin. Institute for Land and Water Management Research.
Chicago (17e ed.) BronvermeldingNão informado. Technical Bulletin. Wageningen, Holanda: Institute for Land and Water Management Research, 2000.
MLA (8e ed.) BronvermeldingNão informado. Technical Bulletin. Institute for Land and Water Management Research, 2000.
Let op: Deze citaties zijn niet altijd 100% accuraat.