ศิริรัตน์ ท, ศรีสุวรรณนภา ช, โรจน์นิรุตติกุล ณ. Factors affecting perception toward safety ohsas 18001 system of operator in thai nippon steel engineering & construction corporation. J. IND. EDUC. [Internet]. 2014 Apr. 30 [cited 2024 May 18];13(1):125-32. Available from: https://ph01.tci-thaijo.org/index.php/JIE/article/view/173214