APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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

Let op: Deze citaties zijn niet altijd 100% accuraat.