APA

Dale C. W., . (1981). Procedure for estimating highway user costs, fuel consumption and air pollution. Washington DC: U.S. Department of Transportation. Federal Highway Administration. Office of Traffic Operations.

Chicago

Dale Charles W, . 1981. Procedure for estimating highway user costs, fuel consumption and air pollution. Washington DC: U.S. Department of Transportation. Federal Highway Administration. Office of Traffic Operations.

Harvard

Dale C. W., . (1981). Procedure for estimating highway user costs, fuel consumption and air pollution. Washington DC: U.S. Department of Transportation. Federal Highway Administration. Office of Traffic Operations.

MLA

Dale Charles W, . Procedure for estimating highway user costs, fuel consumption and air pollution. Washington DC: U.S. Department of Transportation. Federal Highway Administration. Office of Traffic Operations. 1981.