APA (7th ed.) Citation

United States. Environmental Protection Agency. Office of Air Quality Planning and Standards. (1999). Visibility monitoring guidance. U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards.

Chicago Style (17th ed.) Citation

United States. Environmental Protection Agency. Office of Air Quality Planning and Standards. Visibility Monitoring Guidance. Research Triangle Park, NC: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, 1999.

MLA (9th ed.) Citation

United States. Environmental Protection Agency. Office of Air Quality Planning and Standards. Visibility Monitoring Guidance. U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, 1999.