Hammer, W. (1985). Occupational safety management and engineering (3ª ed.). Prentice Hall.
Chicago-viite (17. p.)Hammer, Willie. Occupational Safety Management and Engineering. 3ª ed. Prentice Hall, 1985.
MLA-viite (9. p.)Hammer, Willie. Occupational Safety Management and Engineering. 3ª ed. Prentice Hall, 1985.
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