APA (7th ed.) Citation

United States. Environmental Protection Agency, United States. Public Health Service, National Environmental Health Association, & United States. Environmental Protection Agency. Office of Air and Radiation. (1991). Introduction to indoor air quality, a self-paced learning module. U.S. Environmental Protection Agency, Office of Air and Radiation.

Chicago Style (17th ed.) Citation

United States. Environmental Protection Agency, United States. Public Health Service, National Environmental Health Association, and United States. Environmental Protection Agency. Office of Air and Radiation. Introduction to Indoor Air Quality, a Self-paced Learning Module. [Washington, D.C.?]: U.S. Environmental Protection Agency, Office of Air and Radiation, 1991.

MLA (9th ed.) Citation

United States. Environmental Protection Agency, et al. Introduction to Indoor Air Quality, a Self-paced Learning Module. U.S. Environmental Protection Agency, Office of Air and Radiation, 1991.