Srimangkala, M., and A. Wannasri. “Factors Related to Stress Among Nurse Aids in the Outpatient Department at a Tertiary Hospital under the Department of Medical Services”. Thai Journal of Nursing, vol. 69, no. 3, Sept. 2020, pp. 27-34, https://he02.tci-thaijo.org/index.php/TJN/article/view/245159.