Citazione Stile APA (7a Edizione)

Husain, M. (2018). Environment and ecology- 4th ed For Civil Service Exam (4th.). CL Media(P) Ltd.

Citazione stile Chigago Style (17a edizione)

Husain, Majid. Environment and Ecology- 4th Ed For Civil Service Exam. 4th. New Delhi: CL Media(P) Ltd, 2018.

Citatione MLA (9a ed.)

Husain, Majid. Environment and Ecology- 4th Ed For Civil Service Exam. 4th. CL Media(P) Ltd, 2018.