Παραπομπή APA

Gupta, R., & P N Chopra. (1968). Keynesian economics/3e (3rd ed.). S.Nagin.

Παραπομπή Chicago Style

Gupta, R.D, και P N Chopra. Keynesian Economics/3e. 3rd ed. Delhi: S.Nagin, 1968.

Παραπομπή MLA

Gupta, R.D, και P N Chopra. Keynesian Economics/3e. 3rd ed. S.Nagin, 1968.