Husain, M. (2018). Environment and ecology- 4th ed For Civil Service Exam (4th.). CL Media(P) Ltd.
Chicago-viite (17. p.)Husain, Majid. Environment and Ecology- 4th Ed For Civil Service Exam. 4th. New Delhi: CL Media(P) Ltd, 2018.
MLA-viite (9. p.)Husain, Majid. Environment and Ecology- 4th Ed For Civil Service Exam. 4th. CL Media(P) Ltd, 2018.
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