Lerdpreecha, Settapong, and Wacharapatr Techawattanasiridumrong. 2022. “Guidelines for Development Roles of School Administrators in Academic Administration Under Secondary Education Office Service SingBuri Angthong Angthong Province”. Mahachula Academic Journal 9 (2). Bangkok, Thailand:34-49. https://so04.tci-thaijo.org/index.php/JMA/article/view/254857.