United States. National Highway Traffic Safety Administration. Enforcement and Emergency Services Division. (1977). 55 MPH fact book: Gallons of gasoline saved, fatalities. Dept. of Transportation, National Highway Traffic Safety Administration, Office of Driver and Pedestrian Programs, Enforcement and Emergency Services Division.
Chicago Style (17th ed.) CitationUnited States. National Highway Traffic Safety Administration. Enforcement and Emergency Services Division. 55 MPH Fact Book: Gallons of Gasoline Saved, Fatalities. Washington: Dept. of Transportation, National Highway Traffic Safety Administration, Office of Driver and Pedestrian Programs, Enforcement and Emergency Services Division, 1977.
MLA (9th ed.) CitationUnited States. National Highway Traffic Safety Administration. Enforcement and Emergency Services Division. 55 MPH Fact Book: Gallons of Gasoline Saved, Fatalities. Dept. of Transportation, National Highway Traffic Safety Administration, Office of Driver and Pedestrian Programs, Enforcement and Emergency Services Division, 1977.