United States. Environmental Protection Agency. Office of Air and Radiation. (2007). Using the November 2006 AP42 update in SIPs and transportation conformity determinations in PM₂.₅ and PM₁₀ nonattainment and maintenance areas. U.S. Environmental Protection Agency, Office of Air and Radiation.
Chicago Style (17th ed.) CitationUnited States. Environmental Protection Agency. Office of Air and Radiation. Using the November 2006 AP42 Update in SIPs and Transportation Conformity Determinations in PM₂.₅ and PM₁₀ Nonattainment and Maintenance Areas. Washington, D.C.: U.S. Environmental Protection Agency, Office of Air and Radiation, 2007.
MLA (9th ed.) CitationUnited States. Environmental Protection Agency. Office of Air and Radiation. Using the November 2006 AP42 Update in SIPs and Transportation Conformity Determinations in PM₂.₅ and PM₁₀ Nonattainment and Maintenance Areas. U.S. Environmental Protection Agency, Office of Air and Radiation, 2007.