Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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