Smethurst, G. (1988). Basic water treatment: For application world-wide (2nd ed.). Telford.
Dyfyniad Arddull ChicagoSmethurst, George. Basic Water Treatment: For Application World-wide. 2nd ed. London: Telford, 1988.
Dyfyniad MLASmethurst, George. Basic Water Treatment: For Application World-wide. 2nd ed. Telford, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.