Dyfyniad APA

Water Environment Federation. (2008). Operation of municipal wastewater treatment plants (6a. ed.). WEF Press.

Dyfyniad Arddull Chicago

Water Environment Federation. Operation of Municipal Wastewater Treatment Plants. 6a. ed. Nueva York: WEF Press, 2008.

Dyfyniad MLA

Water Environment Federation. Operation of Municipal Wastewater Treatment Plants. 6a. ed. WEF Press, 2008.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.