Não informado. (1971). Journal of Agricultural Research. Government of the Punjab, Department of Agriculture.
Chicago (17e ed.) BronvermeldingNão informado. Journal of Agricultural Research. Lahore, Paquistao: Government of the Punjab, Department of Agriculture, 1971.
MLA (8e ed.) BronvermeldingNão informado. Journal of Agricultural Research. Government of the Punjab, Department of Agriculture, 1971.
Let op: Deze citaties zijn niet altijd 100% accuraat.