Singh, A. K. (2013). Science & Technology for civil services examinations. Tata Mc Graw Hill.
Chicago Edition CitationSingh, Ashok Kumar. Science & Technology for Civil Services Examinations. New Delhi: Tata Mc Graw Hill, 2013.
ציטוט MLASingh, Ashok Kumar. Science & Technology for Civil Services Examinations. Tata Mc Graw Hill, 2013.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.