Não informado. (1973). Job safety and health. Occupational Safety and Health Administration.
Chicago Style (17. basım) AtıfNão informado. Job Safety and Health. Washington: Occupational Safety and Health Administration, 1973.
MLA (8th ed.) AtıfNão informado. Job Safety and Health. Occupational Safety and Health Administration, 1973.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..