Krishna, K. R. (2002). Soil fertility and crop production. Oxford & IBH Publishing Co. Pvt. Ltd..
Chicago-čujuhus (17. p.)Krishna, K. R. Soil Fertility and Crop Production. New Delhi: Oxford & IBH Publishing Co. Pvt. Ltd., 2002.
MLA-čujuhus (9. p.)Krishna, K. R. Soil Fertility and Crop Production. Oxford & IBH Publishing Co. Pvt. Ltd., 2002.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.