American Water Works Association (AWWA). (2016). Manual of water of supply practices M44. Distribution valves: Selection, instalation, field testing, and mainenance. (Third edition.). Colorado, Estados Unidos de América: American Water Works Association (AWWA).
Chicago Style CitationAmerican Water Works Association (AWWA). Manual of Water of Supply Practices M44. Distribution Valves: Selection, Instalation, Field Testing, and Mainenance. Third edition. Colorado, Estados Unidos de América: American Water Works Association (AWWA), 2016.
MLA CitationAmerican Water Works Association (AWWA). Manual of Water of Supply Practices M44. Distribution Valves: Selection, Instalation, Field Testing, and Mainenance. Third edition. Colorado, Estados Unidos de América: American Water Works Association (AWWA), 2016.