Sengupta, G. C. (1981). Constraints to higher agricultural productivity in Orissa and strategies to overcome: Position paper. Directorate of Agriculture & Food Production.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Sengupta, G. C. Constraints to Higher Agricultural Productivity in Orissa and Strategies to Overcome: Position Paper. Bhubaneswar, Orissa: Directorate of Agriculture & Food Production, 1981.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Sengupta, G. C. Constraints to Higher Agricultural Productivity in Orissa and Strategies to Overcome: Position Paper. Directorate of Agriculture & Food Production, 1981.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.