APA

Ullman J., . (1980). Cost of owning and operating automobiles and vans 1979. Washington DC: U.S. Department of Transportation. FHWA. Office of Highway Planning. Highway Statistics Division.

Chicago

Ullman JE, . 1980. Cost of owning and operating automobiles and vans 1979. Washington DC: U.S. Department of Transportation. FHWA. Office of Highway Planning. Highway Statistics Division.

Harvard

Ullman J., . (1980). Cost of owning and operating automobiles and vans 1979. Washington DC: U.S. Department of Transportation. FHWA. Office of Highway Planning. Highway Statistics Division.

MLA

Ullman JE, . Cost of owning and operating automobiles and vans 1979. Washington DC: U.S. Department of Transportation. FHWA. Office of Highway Planning. Highway Statistics Division. 1980.