K. Meebunmak, PhrakhruKemthammakosit, and B. Weeraponkan, “Guidelines for Internal Supervision Enhancing Quality Classroom based on Sangkhavatthus 4 in Schools of Promkhiri Education Network under Nakhon Si Thammarat Primary Educational Service Area Office 4: Guidelines for Internal Supervision Enhancing Quality Classroom based on Sangkhavatthus 4 in Schools of Promkhiri Education Network under Nakhon Si Thammarat Primary Educational Service Area Office 4”, rtnb, vol. 8, no. 1, pp. 394–407, Apr. 2026.