Dyfyniad APA

METCALF. Wastewater engineering: Treatment and reuse.fourth ed. Mc Graw Hill.

Dyfyniad Arddull Chicago

METCALF. Wastewater Engineering: Treatment and Reuse.fourth Ed. Mc Graw Hill.

Dyfyniad MLA

METCALF. Wastewater Engineering: Treatment and Reuse.fourth Ed. Mc Graw Hill.

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