Hammer, W. (1985). Occupational safety management and engineering (3ª ed.). Prentice Hall.
Chicago-čujuhus (17. p.)Hammer, Willie. Occupational Safety Management and Engineering. 3ª ed. Prentice Hall, 1985.
MLA-čujuhus (9. p.)Hammer, Willie. Occupational Safety Management and Engineering. 3ª ed. Prentice Hall, 1985.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.