APA (7th ed.) Citation

United States. Environmental Protection Agency. Emissions, Monitoring, and Analysis Division. (2000). User's guide for the Assessment System for Population Exposure Nationwide (ASPEN, Version 1.1) model. U.S. Environmental Protection Agency, Office of Air Quality Planning [and Standards], Emissions, Monitoring and Analysis Division.

Chicago Style (17th ed.) Citation

United States. Environmental Protection Agency. Emissions, Monitoring, and Analysis Division. User's Guide for the Assessment System for Population Exposure Nationwide (ASPEN, Version 1.1) Model. Research Triangle Park, N.C.: U.S. Environmental Protection Agency, Office of Air Quality Planning [and Standards], Emissions, Monitoring and Analysis Division, 2000.

MLA (9th ed.) Citation

United States. Environmental Protection Agency. Emissions, Monitoring, and Analysis Division. User's Guide for the Assessment System for Population Exposure Nationwide (ASPEN, Version 1.1) Model. U.S. Environmental Protection Agency, Office of Air Quality Planning [and Standards], Emissions, Monitoring and Analysis Division, 2000.