SMOG

Chicago citation style
Environmental Protection Agency. 12/2/1970-. SMOG. 1972-09. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/545012. (Accessed July 15, 2018.)
APA citation style
Environmental Protection Agency. 12/2/1970-, (1972-09) SMOG. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/545012
MLA citation style
Environmental Protection Agency. 12/2/1970-. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/545012>.
Note: These citations are programmatically generated and may be incomplete.