एपीए उद्धरण

(2015). General studies 2015 paper 1 for civil services preliminary examination. McGraw Hill.

शिकागो स्टाइल उद्धरण

General Studies 2015 Paper 1 for Civil Services Preliminary Examination. New Delhi: McGraw Hill, 2015.

एमएलए उद्धरण

General Studies 2015 Paper 1 for Civil Services Preliminary Examination. McGraw Hill, 2015.