Lal & Ashok Gupta. Upkar's an analytical approach for comprehensive reasoning. Upkar Prakashan.
Chicago Style aipamenaLal and Ashok Gupta. Upkar's an Analytical Approach for Comprehensive Reasoning. Agra: Upkar Prakashan.
MLA aipamenaLal and Ashok Gupta. Upkar's an Analytical Approach for Comprehensive Reasoning. Upkar Prakashan.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.