Não informado. (1970). Farm chemicals and crop life. Meister Publishing.
Chicago (17e ed.) BronvermeldingNão informado. Farm Chemicals and Crop Life. Willoughby, Ohio: Meister Publishing, 1970.
MLA (8e ed.) BronvermeldingNão informado. Farm Chemicals and Crop Life. Meister Publishing, 1970.
Let op: Deze citaties zijn niet altijd 100% accuraat.