สุทธิวรเศรษฐ์ จิตราภรณ์, โตประสี สุรศักดิ์, and วนนะบวรเดชน์ ทชชยา. “Effectiveness of Operation of Pong Nam Ron Sub-District Administrative Organization Child Development Center Khlong Lan District Kamphaeng Phet Province”. Journal of Humanities and Social Sciences, Rajapruk University 4, no. supplement (December 24, 2018): 110–123. accessed October 4, 2026. https://so03.tci-thaijo.org/index.php/rpu/article/view/159615.