Style de citation APA

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

Style de citation Chicago

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

Style de citation MLA

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