APA (7th ed.) Citation

Library of Congress. Congressional Research Service & ProQuest (Firm). (2009). 2006 National Ambient Air Quality Standards (NAAQS) for Fine Particulate Matter (PM2.5): Designating Nonattainment Areas. [publisher not identified].

Chicago Style (17th ed.) Citation

Library of Congress. Congressional Research Service and ProQuest (Firm). 2006 National Ambient Air Quality Standards (NAAQS) for Fine Particulate Matter (PM2.5): Designating Nonattainment Areas. [Place of publication not identified]: [publisher not identified], 2009.

MLA (9th ed.) Citation

Library of Congress. Congressional Research Service and ProQuest (Firm). 2006 National Ambient Air Quality Standards (NAAQS) for Fine Particulate Matter (PM2.5): Designating Nonattainment Areas. [publisher not identified], 2009.