Não informado. (1971). Journal of Agricultural Research. Government of the Punjab, Department of Agriculture.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Agricultural Research. Lahore, Paquistao: Government of the Punjab, Department of Agriculture, 1971.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Agricultural Research. Government of the Punjab, Department of Agriculture, 1971.
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