Dyfyniad APA

Sengar, R., & Kumar, A. (2017). Environment science question bank: A handbook for competitive examinations. CBS Publishers.

Dyfyniad Arddull Chicago

Sengar, R.S, and Amit Kumar. Environment Science Question Bank: A Handbook for Competitive Examinations. New Delhi: CBS Publishers, 2017.

Dyfyniad MLA

Sengar, R.S, and Amit Kumar. Environment Science Question Bank: A Handbook for Competitive Examinations. CBS Publishers, 2017.

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