METCALF. Wastewater engineering: Treatment and reuse.fourth ed. Mc Graw Hill.
Dyfyniad Arddull ChicagoMETCALF. Wastewater Engineering: Treatment and Reuse.fourth Ed. Mc Graw Hill.
Dyfyniad MLAMETCALF. Wastewater Engineering: Treatment and Reuse.fourth Ed. Mc Graw Hill.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.