APA引用形式

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

シカゴスタイル引用形

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

MLA引用形式

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