Chaiyanan, Saovalak. “The Study of Internal Control Systems of Foundations in Phuket”. Journal of Humanities and Social Sciences, Rajapruk University 8, no. 1 (April 25, 2022): 50–65. accessed August 28, 2026. https://so03.tci-thaijo.org/index.php/rpu/article/view/260262.