APA

Masters G. M., Ela W. P., . (2020). Introduction to environmental science. New Delhi: Pearson Education.

Chicago

Masters Gilbert M, Ela Wendell P, . 2020. Introduction to environmental science. New Delhi: Pearson Education.

Harvard

Masters G. M., Ela W. P., . (2020). Introduction to environmental science. New Delhi: Pearson Education.

MLA

Masters Gilbert M, Ela Wendell P, . Introduction to environmental science. New Delhi: Pearson Education. 2020.