Smith, R. B. The New OSHA. Occupational health & safety.
Cita Chicago (17th ed.)Smith, R. Blake. "The New OSHA." Occupational Health & Safety .
Cita MLA (9th ed.)Smith, R. Blake. "The New OSHA." Occupational Health & Safety, .
Atenció: Aquestes cites poden no estar 100% correctes.