Aekanakha, Chayaphat, and tosaporn mahamud. “Factors influencing the core competencies of government officials under the Department of Permanent Secretary for Bangkok”. Chophayom Journal 32, no. 1 (June 29, 2021): 52–73. accessed September 12, 2026. https://so01.tci-thaijo.org/index.php/ejChophayom/article/view/245784.