Sopa, Narongrit, and Nikorn Pattalaka. 2024. “Development of a Handbook for the Supervision of Primary School Teachers in Maha Sarakham Province Parcticipating in the Language and Professional Competencies Development Project”. Chophayom Journal 35 (1):88-120. https://so01.tci-thaijo.org/index.php/ejChophayom/article/view/270497.