Smith, R. B. OSHA releases ergonomics draft. Occupational health & safety.
Lua i Stíl Chicago (17ú heag.)Smith, R. Blake. "OSHA Releases Ergonomics Draft." Occupational Health & Safety .
Lua MLA (9ú heag.)Smith, R. Blake. "OSHA Releases Ergonomics Draft." Occupational Health & Safety, .
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