APA (7th ed.) Zitazioa

Singh, M. N. (2011). Principles of economics. ABD.

Chicago Style (17th ed.) Zitazioa

Singh, Mukti Nath. Principles of Economics. Jaipur: ABD, 2011.

MLA (9th ed.) Zitazioa

Singh, Mukti Nath. Principles of Economics. ABD, 2011.