Martbundit, Chanidapa. 2021. “The Effectiveness of the Development of Basic First Aid for Occupational Accidents Among Employees in Udon Thani Province Workplaces”. Journal of Medicine and Public Health, Ubon Ratchathani University 4 (3):186-93. https://he01.tci-thaijo.org/index.php/jmpubu/article/view/252089.