ASFAHL, C. (1995). Industrial Safety And Health Management C. Ray Asfahl. Prentice-Hall.
Chicago-viite (17. p.)ASFAHL, C.RAY. Industrial Safety And Health Management C. Ray Asfahl. Prentice-Hall, 1995.
MLA-viite (8. p.)ASFAHL, C.RAY. Industrial Safety And Health Management C. Ray Asfahl. Prentice-Hall, 1995.
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