siripon, C. , Pakothang, J. , Srikrachang, S. and Arnupharbsaenyakorn, P. 2022. Quality Assurance Operation within the Educational Institutions under the Office of Sisaket Primary Educational Service Area 3. Journal of Graduate School, Pitchayatat, Ubon Ratchathani Rajabhat University. 17, 2 (Aug. 2022), 17–29.