Narayana, D. L. (1974). Studies in the economics of farm management in Cuddapah District, Andhra Pradesh: Combined report for the period 1967-68 to 1969-70. Directorate of Economics and Statistics, Ministry of Agriculture, Govt. of India.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Narayana, D. L. Studies in the Economics of Farm Management in Cuddapah District, Andhra Pradesh: Combined Report for the Period 1967-68 to 1969-70. [New Delhi]: Directorate of Economics and Statistics, Ministry of Agriculture, Govt. of India, 1974.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Narayana, D. L. Studies in the Economics of Farm Management in Cuddapah District, Andhra Pradesh: Combined Report for the Period 1967-68 to 1969-70. Directorate of Economics and Statistics, Ministry of Agriculture, Govt. of India, 1974.