APA (7th ed.) Citation

(2018). Technical assistance document for the reporting of daily air quality: The Air Quality Index (AQI) (September 2018 [edition].). U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Air Quality Assessment Division.

Chicago Style (17th ed.) Citation

Technical Assistance Document for the Reporting of Daily Air Quality: The Air Quality Index (AQI). September 2018 [edition]. Research Triangle Park, NC: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Air Quality Assessment Division, 2018.

MLA (9th ed.) Citation

Technical Assistance Document for the Reporting of Daily Air Quality: The Air Quality Index (AQI). September 2018 [edition]. U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Air Quality Assessment Division, 2018.