Gupta,R P, Satyendra Kumar, & Tirlok Singh. (1984). Soil management to increase crop production: A consolidated report 1967-82 of all India coordinated research project on improvement of soil. ICAR.
استشهاد بنمط شيكاغوGupta,R P, Satyendra Kumar, و Tirlok Singh. Soil Management to Increase Crop Production: A Consolidated Report 1967-82 of All India Coordinated Research Project on Improvement of Soil. New Delhi: ICAR, 1984.
MLA استشهادGupta,R P, et al. Soil Management to Increase Crop Production: A Consolidated Report 1967-82 of All India Coordinated Research Project on Improvement of Soil. ICAR, 1984.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.