APA

National Accident Sampling System, . (1981). Report on traffic accidents and injuries for 1979. Washington DC: Research and Development National Center for Statistics and Analysis.

Chicago

National Accident Sampling System, . 1981. Report on traffic accidents and injuries for 1979. Washington DC: Research and Development National Center for Statistics and Analysis.

Harvard

National Accident Sampling System, . (1981). Report on traffic accidents and injuries for 1979. Washington DC: Research and Development National Center for Statistics and Analysis.

MLA

National Accident Sampling System, . Report on traffic accidents and injuries for 1979. Washington DC: Research and Development National Center for Statistics and Analysis. 1981.