Dwivedi, D. N. (1985). Principles of economics. Vikas Publishing House Pvt Ltd..
芝加哥风格引文Dwivedi, D. N. Principles of Economics. New Delhi: Vikas Publishing House Pvt Ltd., 1985.
MLA引文Dwivedi, D. N. Principles of Economics. Vikas Publishing House Pvt Ltd., 1985.
警告：这些引文格式不一定是100％准确.