Pratiyogita Darpan ed. Upkar's UPSC civil service preliminary exam General studies. Upkar Prakashan.
Chicago Edition CitationPratiyogita Darpan ed. Upkar's UPSC Civil Service Preliminary Exam General Studies. Agra: Upkar Prakashan.
MLA Edition CitationPratiyogita Darpan ed. Upkar's UPSC Civil Service Preliminary Exam General Studies. Upkar Prakashan.
Warning: These citations may not always be 100% accurate.