Παραπομπή APA

Seth, M. (1997). Principles of economics (31st ed.). Lakshmi Narain Agarwal.

Παραπομπή Chicago Style

Seth, M.L. Principles of Economics. 31st ed. Agra: Lakshmi Narain Agarwal, 1997.

Παραπομπή MLA

Seth, M.L. Principles of Economics. 31st ed. Lakshmi Narain Agarwal, 1997.