SAWYER, C. N., McCARTY, P. L., & PARKIN, G. F. (1994). Chemistry for environmental engineering.-- Ed.4. McGraw-Hill.

SAWYER, Clair N., Perry L. McCARTY, and Gene F. PARKIN. Chemistry for Environmental Engineering.-- Ed.4. New York: McGraw-Hill, 1994.

SAWYER, Clair N., et al. Chemistry for Environmental Engineering.-- Ed.4. McGraw-Hill, 1994.