D. Jantamoon, C. Ruangsuwan, and P. . Phoojomjit, “A Model of Ethical Leadership Development of School Administrators Under The Secondary Educational Service Area Office Kalasin: A Model of Ethical Leadership Development of School Administrators Under The Secondary Educational Service Area Office Kalasin”, rtnb, vol. 5, no. 3, pp. 582–599, Dec. 2023.