United States. Environmental Protection Agency. Office of Air and Radiation. (1999). Smog--who does it hurt?: What you need to know about ozone and your health. U.S. Environmental Protection Agency, Air and Radiation.
Chicago Style (17th ed.) CitationUnited States. Environmental Protection Agency. Office of Air and Radiation. Smog--who Does It Hurt?: What You Need to Know About Ozone and Your Health. Washington, DC: U.S. Environmental Protection Agency, Air and Radiation, 1999.
MLA (9th ed.) CitationUnited States. Environmental Protection Agency. Office of Air and Radiation. Smog--who Does It Hurt?: What You Need to Know About Ozone and Your Health. U.S. Environmental Protection Agency, Air and Radiation, 1999.
Warning: These citations may not always be 100% accurate.