National Institute for Occupational Safety and Health. (1977). National occupational hazard survey. volume 3. survey analysis and supplemental tables. National Institute for Occupational Safety and Health.
Citazione stile Chigago Style (17a edizione)National Institute for Occupational Safety and Health. National Occupational Hazard Survey. Volume 3. Survey Analysis and Supplemental Tables. Cincinnati, Ohio: National Institute for Occupational Safety and Health, 1977.
Citatione MLA (8a ed.)National Institute for Occupational Safety and Health. National Occupational Hazard Survey. Volume 3. Survey Analysis and Supplemental Tables. National Institute for Occupational Safety and Health, 1977.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.