ประวันเตา วิรัช, and เพียรทำ จามจุรี. “Satisfaction of Outpatients at Central and General Hospital Fiscal Year 2018, Thailand”. Journal of Health Science of Thailand 31, no. 2 (April 29, 2022): 307–318. Accessed July 22, 2024. https://thaidj.org/index.php/JHS/article/view/12016.