Não informado. (1971). Journal of Agricultural Research. Government of the Punjab, Department of Agriculture.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Journal of Agricultural Research. Lahore, Paquistao: Government of the Punjab, Department of Agriculture, 1971.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Journal of Agricultural Research. Government of the Punjab, Department of Agriculture, 1971.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.