Singh, R. (1987). Farm production in rainfed sub-mountains Punjab. B.R. Publishing.
Chicago-čujuhus (17. p.)Singh, Rachhpal. Farm Production in Rainfed Sub-mountains Punjab. Delhi: B.R. Publishing, 1987.
MLA-čujuhus (9. p.)Singh, Rachhpal. Farm Production in Rainfed Sub-mountains Punjab. B.R. Publishing, 1987.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.