Dyfyniad APA

(1981). Water And Wastewater Engineering Systems D. Barnes [et Al.]. Pitman.

Dyfyniad Arddull Chicago

Water And Wastewater Engineering Systems D. Barnes [et Al.]. Pitman, 1981.

Dyfyniad MLA

Water And Wastewater Engineering Systems D. Barnes [et Al.]. Pitman, 1981.

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