APA引文

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.

Chicago Edition Citation

Chopra, J.K, and 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.

MLA引文

Chopra, J.K, and 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.