Dyfyniad APA

METCALF. (1991). Wastewater Engineering Treatment Disposal Reuse Metcalf And Eddy. McGraw-Hill.

Dyfyniad Arddull Chicago

METCALF. Wastewater Engineering Treatment Disposal Reuse Metcalf And Eddy. McGraw-Hill, 1991.

Dyfyniad MLA

METCALF. Wastewater Engineering Treatment Disposal Reuse Metcalf And Eddy. McGraw-Hill, 1991.

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