Ketaiam, M., and Y. Yeabkai. “Factors Affecting the Health Consumer Protection Performance Among Village Health Volunteers in Sukhothai Province”. Journal of Public Health and Health Sciences Research, vol. 2, no. 2, Aug. 2020, pp. 37-49, https://he01.tci-thaijo.org/index.php/JPHNU/article/view/243847.