Não informado. Oil Palm News. Tropical Products Institute, Oil Palm Advisory Bureau.
Chicago (17e ed.) BronvermeldingNão informado. Oil Palm News. London: Tropical Products Institute, Oil Palm Advisory Bureau.
MLA (8e ed.) BronvermeldingNão informado. Oil Palm News. Tropical Products Institute, Oil Palm Advisory Bureau.
Let op: Deze citaties zijn niet altijd 100% accuraat.