Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.