Sharma, A. (2017). General studies for civil services preliminary examination GS paper-II (UPSC). McGraw hill Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSharma, Arun. General Studies for Civil Services Preliminary Examination GS Paper-II (UPSC). Chennai: McGraw hill Education, 2017.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSharma, Arun. General Studies for Civil Services Preliminary Examination GS Paper-II (UPSC). McGraw hill Education, 2017.
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