Pratumsai, Pavinee, Sunthon Saikham, and Sombat Ratnakon. 2022. “The Characteristics of Educational Institution Administrators in the 21st According to the Dutiyapapanika Sutta of the Administrators under the Udonthani Secondary Educational Service Area Office District 23”. Journal of Modern Learning Development 7 (3):55-67. https://so06.tci-thaijo.org/index.php/jomld/article/view/254666.