Subkhian, S., and N. Noosorn. “Factors associated with the competency of prevention and control coronavirus disease 2019 among public health personnel in a Singburi Province in health region 4”. Journal of Medical and Public Health Region 4, vol. 13, no. 1, Apr. 2023, pp. 56-70, https://he01.tci-thaijo.org/index.php/JMPH4/article/view/260944.