DRIVER HOLDING HIS CAR'S TEST CARD AS IT PROCEEDS ALONG THE SAFETY LANE DURING A CHECKUP AT AN AUTO EMISSION INSPECTION STATION IN DOWNTOWN CINCINNATI, OHIO. SINCE JANUARY, 1975, ALL VEHICLES IN THE CITY ARE BEING CHECKED ONCE A YEAR ON SAFETY REQUIREMENTS PREVIOUSLY THEY WERE TESTED SEMI-ANNUALLY. THE CHANGE WAS MADE BECAUSE OF THE ADDITION OF CARBON MONOXIDE AND HYDROCARBON EMISSIONS TESTING ON LIGHT DUTY, SPARK IGNITION POWERED MOTOR VEHICLES

Chicago citation style
Environmental Protection Agency. 12/2/1970-. DRIVER HOLDING HIS CAR'S TEST CARD AS IT PROCEEDS ALONG THE SAFETY LANE DURING A CHECKUP AT AN AUTO EMISSION INSPECTION STATION IN DOWNTOWN CINCINNATI, OHIO. SINCE JANUARY, 1975, ALL VEHICLES IN THE CITY ARE BEING CHECKED ONCE A YEAR ON SAFETY REQUIREMENTS PREVIOUSLY THEY WERE TESTED SEMI-ANNUALLY. THE CHANGE WAS MADE BECAUSE OF THE ADDITION OF CARBON MONOXIDE AND HYDROCARBON EMISSIONS TESTING ON LIGHT DUTY, SPARK IGNITION POWERED MOTOR VEHICLES. 1975-09. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/557888. (Accessed June 20, 2018.)
APA citation style
Environmental Protection Agency. 12/2/1970-, (1975-09) DRIVER HOLDING HIS CAR'S TEST CARD AS IT PROCEEDS ALONG THE SAFETY LANE DURING A CHECKUP AT AN AUTO EMISSION INSPECTION STATION IN DOWNTOWN CINCINNATI, OHIO. SINCE JANUARY, 1975, ALL VEHICLES IN THE CITY ARE BEING CHECKED ONCE A YEAR ON SAFETY REQUIREMENTS PREVIOUSLY THEY WERE TESTED SEMI-ANNUALLY. THE CHANGE WAS MADE BECAUSE OF THE ADDITION OF CARBON MONOXIDE AND HYDROCARBON EMISSIONS TESTING ON LIGHT DUTY, SPARK IGNITION POWERED MOTOR VEHICLES. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/557888
MLA citation style
Environmental Protection Agency. 12/2/1970-. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/557888>.
Note: These citations are programmatically generated and may be incomplete.