Davis, M. L., & Cornwell, D. A. (2013). Introduction to environmental engineering (Fifth edition.). McGraw-Hill.

Davis, Mackenzie L., and David A. Cornwell. Introduction to Environmental Engineering. Fifth edition. New York: McGraw-Hill, 2013.

Davis, Mackenzie L., and David A. Cornwell. Introduction to Environmental Engineering. Fifth edition. McGraw-Hill, 2013.