APA استشهاد

Chopra, P. (1970). Advanced Economic Theory: :Micro and macro analysis. Lyall Book Depot.

استشهاد بنمط شيكاغو

Chopra, P.N. Advanced Economic Theory: :Micro and Macro Analysis. Ludhiana: Lyall Book Depot, 1970.

MLA استشهاد

Chopra, P.N. Advanced Economic Theory: :Micro and Macro Analysis. Lyall Book Depot, 1970.