Gupta, U. S. (1997). Crop improvement: Stress tolerance. Oxford & IBH Publishing Co. Pvt. Ltd..
Cita Chicago (17th ed.)Gupta, U. S. Crop Improvement: Stress Tolerance. New Delhi: Oxford & IBH Publishing Co. Pvt. Ltd., 1997.
Cita MLA (9th ed.)Gupta, U. S. Crop Improvement: Stress Tolerance. Oxford & IBH Publishing Co. Pvt. Ltd., 1997.
Atenció: Aquestes cites poden no estar 100% correctes.