Phamorn, Nilubol, and เฉลิมวงศาเวช วัลลภา. “Factors Affecting the Morale on Work Performance of Government Teachers in Samutprakan Primary Educational Service Area Office 2”. Al-HIKMAH Journal 12, no. 23 (August 31, 2022): 155–169. Accessed May 3, 2024. https://so01.tci-thaijo.org/index.php/HIKMAH/article/view/255848.