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. JDSC [internet]. 2022 Aug. 3 [cited 2026 Oct. 8];9(2):171-80. available from: https://so03.tci-thaijo.org/index.php/rdirmu/article/view/254600