Waterman, E. L. (1938). Elements of water supply engineering (2d ed.). J. Wiley & Sons, inc.; Chapman & Hall, limited.
Dyfyniad Arddull ChicagoWaterman, Earle Lytton. Elements of Water Supply Engineering. 2d ed. New York, London: J. Wiley & Sons, inc.; Chapman & Hall, limited, 1938.
Dyfyniad MLAWaterman, Earle Lytton. Elements of Water Supply Engineering. 2d ed. J. Wiley & Sons, inc.; Chapman & Hall, limited, 1938.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.