APA (7th ed.) Zitazioa

Krishna, K. R. (2002). Soil fertility and crop production. Oxford & IBH Publishing Co. Pvt. Ltd..

Chicago Style (17th ed.) Zitazioa

Krishna, K. R. Soil Fertility and Crop Production. New Delhi: Oxford & IBH Publishing Co. Pvt. Ltd., 2002.

MLA (9th ed.) Zitazioa

Krishna, K. R. Soil Fertility and Crop Production. Oxford & IBH Publishing Co. Pvt. Ltd., 2002.