APA সাইটেশন

Chopra, J., & Sen, S. M. (2001). Unique quintessence of sociology for UPSC civil services preliminary examinations, P.C.S., S.S.C., universities and other competitive examinations (25th ed.). Unique Publishers.

শিকাগো স্টাইলে সাইটেশন

Chopra, J.K, এবং S. Mansukhani Sen. Unique Quintessence of Sociology for UPSC Civil Services Preliminary Examinations, P.C.S., S.S.C., Universities and Other Competitive Examinations. 25th ed. New Delhi: Unique Publishers, 2001.

এমএলএ সাইটেশন

Chopra, J.K, এবং S. Mansukhani Sen. Unique Quintessence of Sociology for UPSC Civil Services Preliminary Examinations, P.C.S., S.S.C., Universities and Other Competitive Examinations. 25th ed. Unique Publishers, 2001.