Depue, L. (2003). Safety management systems: A synthesis of highway practice. Transportation Research Board, National Research Council.
Lua i Stíl Chicago (17ú heag.)Depue, Leanna. Safety Management Systems: A Synthesis of Highway Practice. Washington, D.C: Transportation Research Board, National Research Council, 2003.
Lua MLA (9ú heag.)Depue, Leanna. Safety Management Systems: A Synthesis of Highway Practice. Transportation Research Board, National Research Council, 2003.
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