Singh S P, Gangwar B, & Singh M P. (2010). Characterization and Evaluation of Existing Farming Systems of Uttar Pradesh. project Directorate of Farming systems Research.
استشهاد بنمط شيكاغوSingh S P, Gangwar B, و Singh M P. Characterization and Evaluation of Existing Farming Systems of Uttar Pradesh. Modipuram,Meerut,U P ,India: project Directorate of Farming systems Research, 2010.
MLA استشهادSingh S P, et al. Characterization and Evaluation of Existing Farming Systems of Uttar Pradesh. project Directorate of Farming systems Research, 2010.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.