Siripornpibul, Taweesak, Kantabhat Ausaksathien, and Chakkraphan Phetphum. “Happiness Level of People Working in the 24 District Health System Management Locations the Health Service Provider Board office 2 and 3, Thailand”. NU Journal of Nursing and Health Sciences 12, no. 1 (December 21, 2018): 173–182. accessed September 28, 2026. https://he01.tci-thaijo.org/index.php/NurseNu/article/view/161622.