APA استشهاد

Puri, G. K. (1988). Political science for civil services preliminary examination. Sudha Pub..

استشهاد بنمط شيكاغو

Puri, G. K. Political Science for Civil Services Preliminary Examination. New Delhi: Sudha Pub., 1988.

MLA استشهاد

Puri, G. K. Political Science for Civil Services Preliminary Examination. Sudha Pub., 1988.