Dyfyniad APA

(1991). Wastewater engineering: Treatment, disposal, and reuse (3rd ed.). New York: McGraw-Hill.

Dyfyniad Arddull Chicago

Wastewater Engineering: Treatment, Disposal, and Reuse. 3rd ed. New York: McGraw-Hill, 1991.

Dyfyniad MLA

Wastewater Engineering: Treatment, Disposal, and Reuse. 3rd ed. New York: McGraw-Hill, 1991.

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