McGraw Hill Education Series. (2014). General Studies for civil Services Preliminary Examination - Paer - II- 2014. McGraw Hill Education (India) Pvt. Ltd.
Chicago-referens (17:e uppl.)McGraw Hill Education Series. General Studies for Civil Services Preliminary Examination - Paer - II- 2014. New Delhi: McGraw Hill Education (India) Pvt. Ltd, 2014.
MLA-referens (9:e uppl.)McGraw Hill Education Series. General Studies for Civil Services Preliminary Examination - Paer - II- 2014. McGraw Hill Education (India) Pvt. Ltd, 2014.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.