Umarat Sirijaroonwong. 2006. A study on the effectiveness of internal auditing of the TIS 18001 occupational health and safety management system, a case study in a cement manufacturing plant. Field of Study Industrial Hygiene and Safety, Mahidol University;
Umarat Sirijaroonwong. (2006) A study on the effectiveness of internal auditing of the TIS 18001 occupational health and safety management system, a case study in a cement manufacturing plant . Mahidol University/Bangkok.
Umarat Sirijaroonwong. A study on the effectiveness of internal auditing of the TIS 18001 occupational health and safety management system, a case study in a cement manufacturing plant. . Bangkok:Mahidol University, 2006.
Umarat Sirijaroonwong. (2006) A study on the effectiveness of internal auditing of the TIS 18001 occupational health and safety management system, a case study in a cement manufacturing plant . Mahidol University/Bangkok.