Dyfyniad APA
American Water Works Association & ebrary, Inc. (2009). Ductile-iron pipe and fittings (3rd ed.). American Water Works Association.
Dyfyniad Arddull Chicago
American Water Works Association and Inc ebrary. Ductile-iron Pipe and Fittings. 3rd ed. Denver, Colo.: American Water Works Association, 2009.
Dyfyniad MLA
American Water Works Association and Inc ebrary. Ductile-iron Pipe and Fittings. 3rd ed. American Water Works Association, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.