APA-ийн эшлэл(7 дахь хэвлэлт)

Singh, S. &. P. (2019). General studies for civil services preliminary examination 2019. McGraw Hill.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Singh, Surendra & Parmar. General Studies for Civil Services Preliminary Examination 2019. Chennai: McGraw Hill, 2019.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Singh, Surendra & Parmar. General Studies for Civil Services Preliminary Examination 2019. McGraw Hill, 2019.