APA (7th ed.) Citation

United States. Environmental Protection Agency. (1998). National Emission Trends CD-ROM viewer (Version 2.0.). U.S. Environmental Protection Agency.

Chicago Style (17th ed.) Citation

United States. Environmental Protection Agency. National Emission Trends CD-ROM Viewer. Version 2.0. [Washington, D.C.?]: U.S. Environmental Protection Agency, 1998.

MLA (9th ed.) Citation

United States. Environmental Protection Agency. National Emission Trends CD-ROM Viewer. Version 2.0. U.S. Environmental Protection Agency, 1998.