Dyfyniad APA

American Water Works Association & ebrary, Inc. (2001). Emergency planning for water utilities (4th ed.). American Water Works Association.

Dyfyniad Arddull Chicago

American Water Works Association and Inc ebrary. Emergency Planning for Water Utilities. 4th ed. Denver, Colo.: American Water Works Association, 2001.

Dyfyniad MLA

American Water Works Association and Inc ebrary. Emergency Planning for Water Utilities. 4th ed. American Water Works Association, 2001.

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