Style de citation APA (7e éd.)

Singh,B. (2019). General Studies 2019 For UPSC,SSC etc. NE.

Style de citation Chicago (17e éd.)

Singh,B. General Studies 2019 For UPSC,SSC Etc. New Delhi: NE, 2019.

Style de citation MLA (9e éd.)

Singh,B. General Studies 2019 For UPSC,SSC Etc. NE, 2019.