Singh, S. &. P. (2019). General studies for civil services preliminary examination 2019. McGraw Hill.
Citación estilo ChicagoSingh, Surendra & Parmar. General Studies for Civil Services Preliminary Examination 2019. Chennai: McGraw Hill, 2019.
Cita MLASingh, Surendra & Parmar. General Studies for Civil Services Preliminary Examination 2019. McGraw Hill, 2019.
Warning: These citations may not always be 100% accurate.