APA সাইটেশন

Gopal K Puri. (2009). Political science for civil services (I.A.S) preliminary examination. IIMS.

শিকাগো স্টাইলে সাইটেশন

Gopal K Puri. Political Science for Civil Services (I.A.S) Preliminary Examination. New Delhi: IIMS, 2009.

এমএলএ সাইটেশন

Gopal K Puri. Political Science for Civil Services (I.A.S) Preliminary Examination. IIMS, 2009.