Hopkin, J. M., & Britain), T. R. L. (. (1993). Police and hospital recording of non-fatal road accident casualties: A study in Greater Manchester. Crowthorne, Eng. : TRL.
Lua i Stíl Chicago (17ú heag.)Hopkin, Jean M., agus Transport Research Laboratory (Great Britain). Police and Hospital Recording of Non-fatal Road Accident Casualties: A Study in Greater Manchester. Crowthorne, Eng. : TRL, 1993.
Lua MLA (9ú heag.)Hopkin, Jean M., agus Transport Research Laboratory (Great Britain). Police and Hospital Recording of Non-fatal Road Accident Casualties: A Study in Greater Manchester. Crowthorne, Eng. : TRL, 1993.
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