Sarnkham, Suwanan, Prasong Hassarin, and PhrakhruPariyattikhunrangsi -. 2023. “The Academic Administration by the Principle of Four Sangahavathu for the Administrators under the Office of Loei Primary Educational Service Area 2”. Journal of Graduate Saket Review 8 (2):24-35. https://so03.tci-thaijo.org/index.php/saketreview/article/view/261721.