APA aipamena

Dwivedi, D. N. (1985). Principles of economics. Vikas Publishing House Pvt Ltd..

Chicago Style aipamena

Dwivedi, D. N. Principles of Economics. New Delhi: Vikas Publishing House Pvt Ltd., 1985.

MLA aipamena

Dwivedi, D. N. Principles of Economics. Vikas Publishing House Pvt Ltd., 1985.