APA সাইটেশন

Surender Singh. (2019). General Studies Paper I for Civil Services Preliminary Examination. McGraw Hill Education Pvt Ltd.

শিকাগো স্টাইলে সাইটেশন

Surender Singh. General Studies Paper I for Civil Services Preliminary Examination. Chennai: McGraw Hill Education Pvt Ltd, 2019.

এমএলএ সাইটেশন

Surender Singh. General Studies Paper I for Civil Services Preliminary Examination. McGraw Hill Education Pvt Ltd, 2019.