United States. Environmental Protection Agency. Ambient Standards Group. (2009). Policy assessment for the review of the particulate matter national ambient air quality standards: Preliminary draft. U. S. Environmental Protection Agency, Office of Air and Radiation, Office of Air Quality Planning and Standards, Health and Environmental Impacts Division, Ambient Standards Group.
Chicago Style (17th ed.) CitationUnited States. Environmental Protection Agency. Ambient Standards Group. Policy Assessment for the Review of the Particulate Matter National Ambient Air Quality Standards: Preliminary Draft. Research Triangle Park, N.C.: U. S. Environmental Protection Agency, Office of Air and Radiation, Office of Air Quality Planning and Standards, Health and Environmental Impacts Division, Ambient Standards Group, 2009.
MLA (9th ed.) CitationUnited States. Environmental Protection Agency. Ambient Standards Group. Policy Assessment for the Review of the Particulate Matter National Ambient Air Quality Standards: Preliminary Draft. U. S. Environmental Protection Agency, Office of Air and Radiation, Office of Air Quality Planning and Standards, Health and Environmental Impacts Division, Ambient Standards Group, 2009.