Jaitue, A., and T. . Chernbamrung. “Incidence of Coronavirus 2019 in Workplace After Self Evaluation of Risk Assessment and Vigilant Measures Against the Spread of Coronavirus 2019 (COVID-19), Rayong Province”. Journal of Preventive Medicine Association of Thailand, vol. 12, no. 1, May 2022, pp. 1-13, https://he01.tci-thaijo.org/index.php/JPMAT/article/view/251971.