American Public Health Association, American Public Health Association, American Water Works Association, & Water environment Federation. (2005). Standard methods for the examination of water & wastewater / (21 edition.). Washington, Estados Unidos de América: American Public Health Association.
Chicago Style CitationAmerican Public Health Association, American Public Health Association, American Water Works Association, and Water environment Federation. Standard Methods for the Examination of Water & Wastewater /. 21 edition. Washington, Estados Unidos de América: American Public Health Association, 2005.
MLA CitationAmerican Public Health Association, American Public Health Association, American Water Works Association, and Water environment Federation. Standard Methods for the Examination of Water & Wastewater /. 21 edition. Washington, Estados Unidos de América: American Public Health Association, 2005.