Dwivedi, D. N. (1985). Principles of economics. Vikas Publishing House Pvt Ltd..
Lua i Stíl Chicago (17ú heag.)Dwivedi, D. N. Principles of Economics. New Delhi: Vikas Publishing House Pvt Ltd., 1985.
Lua MLA (8ú heag.)Dwivedi, D. N. Principles of Economics. Vikas Publishing House Pvt Ltd., 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.