APA-ийн эшлэл(7 дахь хэвлэлт)

Sharma, A. (2017). General studies for civil services preliminary examination GS paper-II (UPSC). McGraw hill Education.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Sharma, Arun. General Studies for Civil Services Preliminary Examination GS Paper-II (UPSC). Chennai: McGraw hill Education, 2017.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Sharma, Arun. General Studies for Civil Services Preliminary Examination GS Paper-II (UPSC). McGraw hill Education, 2017.