Hammer, W. (1985). Occupational safety management and engineering (3ª ed.). Prentice Hall.
Chicago-referens (17:e uppl.)Hammer, Willie. Occupational Safety Management and Engineering. 3ª ed. Prentice Hall, 1985.
MLA-referens (9:e uppl.)Hammer, Willie. Occupational Safety Management and Engineering. 3ª ed. Prentice Hall, 1985.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.