United States. Environmental Protection Agency. Office of Water. (2003). Dip into volunteer monitoring with the Great North American Secchi Dip-In. United States Environmental Protection Agency, Office of Water.
Chicago Style (17th ed.) CitationUnited States. Environmental Protection Agency. Office of Water. Dip into Volunteer Monitoring with the Great North American Secchi Dip-In. [Washington, D.C.]: United States Environmental Protection Agency, Office of Water, 2003.
MLA (9th ed.) CitationUnited States. Environmental Protection Agency. Office of Water. Dip into Volunteer Monitoring with the Great North American Secchi Dip-In. United States Environmental Protection Agency, Office of Water, 2003.
Warning: These citations may not always be 100% accurate.