Phithakkhetkhan, Tabtim, and Ratana Daungkaew. 2019. “Need Assessment in Promoting Teachers’Classroom Action Research of School Administrators in the Phaya-Wang Secondary Schools under Secondary Educational Service Area Office 35”. Journal of Research and Development Institute Rajabhat Maha Sarakham University 6 (1):91-102. https://so03.tci-thaijo.org/index.php/rdirmu/article/view/211373.