ศิริจรูญวงศ์ อุมารัตน์. “Preliminary Hazard Analysis (PHA): Hazard Identification Technique for Work Accident Prevention”. HCU Journal 23, no. 1 (June 27, 2019): 161–172. Accessed April 26, 2024. https://he01.tci-thaijo.org/index.php/HCUJOURNAL/article/view/147667.