Robchangwat, W., and S. Inrak. “Role of Administrator and Teacher Performance in School under The Secondary Educational Service Area Office 8”. Journal of Humanities and Social Sciences, Rajapruk University, vol. 7, no. 1, Apr. 2021, pp. 226-40, https://so03.tci-thaijo.org/index.php/rpu/article/view/251681.