Singh, A. K. (2008). Science and technology for civil services examinations. Tata Mc-Graw Hill.
Chicago Edition CitationSingh, Ashok Kumar. Science and Technology for Civil Services Examinations. New Delhi: Tata Mc-Graw Hill, 2008.
Cita MLASingh, Ashok Kumar. Science and Technology for Civil Services Examinations. Tata Mc-Graw Hill, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.