APA (7th ed.) Citation

Clean Air Technology Center (U.S.). (1999). Nitrogen oxides (NOx): Why and how they are controlled. Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency.

Chicago Style (17th ed.) Citation

Clean Air Technology Center (U.S.). Nitrogen Oxides (NOx): Why and How They Are Controlled. Research Triangle Park, N.C.: Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, 1999.

MLA (9th ed.) Citation

Clean Air Technology Center (U.S.). Nitrogen Oxides (NOx): Why and How They Are Controlled. Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, 1999.