APA

Smith R., Lunn E., . (1979). National accident sampling system. A status report. Vol IV. Washington DC: U.S. Department of Transportation. National Highway Traffic Safety Administration.

Chicago

Smith RA, Lunn E, . 1979. National accident sampling system. A status report. Vol IV. Washington DC: U.S. Department of Transportation. National Highway Traffic Safety Administration.

Harvard

Smith R., Lunn E., . (1979). National accident sampling system. A status report. Vol IV. Washington DC: U.S. Department of Transportation. National Highway Traffic Safety Administration.

MLA

Smith RA, Lunn E, . National accident sampling system. A status report. Vol IV. Washington DC: U.S. Department of Transportation. National Highway Traffic Safety Administration. 1979.