ช่วยรักษา ด. “Internal Quality Assurance System of Opportunity Expansion Schools under SakonNakhon Primary Educational Service Area Office”. Pathumthani University Academic Journal, vol. 11, no. 1, June 2019, pp. 197-08, https://so05.tci-thaijo.org/index.php/ptujournal/article/view/187067.