APA aipamena

Chopra, P. S., & Chopra , J. K. (2005). UNIQUE QUINTESSENCE for UPSC Civil services (24.). Unique Publishers.

Chicago Style aipamena

Chopra, P. S., and J. K. Chopra. UNIQUE QUINTESSENCE for UPSC Civil Services. 24. New Delhi: Unique Publishers, 2005.

MLA aipamena

Chopra, P. S., and J. K. Chopra. UNIQUE QUINTESSENCE for UPSC Civil Services. 24. Unique Publishers, 2005.