Unjai S, Lunsamrong P, Romsri S. Operations in the management of the internal educational quality assurance system of schools under the Sakon Nakhon Primary Educational Service Area Office 3. JRDI. RMU [Internet]. 2022 Aug. 3 [cited 2024 May 19];9(2):171-80. Available from: https://so03.tci-thaijo.org/index.php/rdirmu/article/view/254600