Benefield, L. D., & Judkins, J. F. W. (1982). Process Chemistry for Water and Waste Water Treatment. Prentice-Hall of India.
Dyfyniad Arddull ChicagoBenefield, Larry. D., and Joseph. F Weand Judkins. Process Chemistry for Water and Waste Water Treatment. New Jersey: Prentice-Hall of India, 1982.
Dyfyniad MLABenefield, Larry. D., and Joseph. F Weand Judkins. Process Chemistry for Water and Waste Water Treatment. Prentice-Hall of India, 1982.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.