Prangprasit, Siriporn. “Factor Affecting Medical Services Utilization of Insured Persons at the Phanakornsiayutthaya Hospital According to the Social Security Act B.E. 2533”. Journal of Health Science of Thailand 4, no. 1 (March 27, 1995): 1–12. Accessed December 8, 2025. https://www.thaidj.org/index.php/JHS/article/view/6672.