APA-referens

Sharma, A. (2016). Environment (Covering Entire Syllabus of IAS Prelim & Main Exam).

Chicago-stil citat

Sharma, Archana. Environment (Covering Entire Syllabus of IAS Prelim & Main Exam). New Delhi, Face the Challenge Academy, 2016.

MLA-referens

Sharma, Archana. Environment (Covering Entire Syllabus of IAS Prelim & Main Exam). 2016.