แจ้งสว่าง ร. A Study of Problems and the Internal Quality Assurance Pothale 02 under School Coordinate Group Phichit Primary Service Area Office 2. edunsrujournal [Internet]. 2022 Jan. 29 [cited 2024 May 17];3(3):45-56. Available from: https://so02.tci-thaijo.org/index.php/edunsrujo/article/view/254276