Jaitue อำนวยพร, and Chernbamrung ธีระศิษฏ์. “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 12, no. 1 (May 18, 2022): 1–13. Accessed August 18, 2022. https://he01.tci-thaijo.org/index.php/JPMAT/article/view/251971.