APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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