Kidarn, K., and T. Takaew. “Factors Affecting Coronavirus Disease 2019 Infection Among Health Volunteers in Wang Nuea District, Lampang Province”. Journal of Public Health and Health Sciences Research, vol. 5, no. 3, Dec. 2023, pp. 168-82, https://he01.tci-thaijo.org/index.php/JPHNU/article/view/260733.