Saengmanee P, Sumetpariyattikun P, Samakkhi P. Instructional Leadership Based on the Iddhipada Iv Principles of School Administration Promoting Educational Innovation in Thungyai Cluster the Secondary Educational Service Area Office of Nakhon Si Thammarat: Instructional Leadership Based on the Iddhipada Iv Principles of School Administration Promoting Educational Innovation in Thungyai Cluster the Secondary Educational Service Area Office of Nakhon Si Thammarat. rtnb [internet]. 2026 Aug. 31 [cited 2026 Sep. 3];8(2):102-16. available from: https://so07.tci-thaijo.org/index.php/rtnb/article/view/10672