India. Directorate of Economics and Statistics. (1980). Estimates of area and production of principal crops in India. Directorate of Economics and Statistics.
芝加哥风格引文India. Directorate of Economics and Statistics. Estimates of Area and Production of Principal Crops in India. New Delhi: Directorate of Economics and Statistics, 1980.
MLA引文India. Directorate of Economics and Statistics. Estimates of Area and Production of Principal Crops in India. Directorate of Economics and Statistics, 1980.
警告：这些引文格式不一定是100％准确.