Dyfyniad APA

(2003). Wastewater treatment plant design. Alexandria, VA: Water Environment Federation.

Dyfyniad Arddull Chicago

Wastewater Treatment Plant Design. Alexandria, VA: Water Environment Federation, 2003.

Dyfyniad MLA

Wastewater Treatment Plant Design. Alexandria, VA: Water Environment Federation, 2003.

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