Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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