Panmujcha, Nukul, Tassanee Chotientip, and Wirat Maneephruek. “Strategy for Development of student,s Ethics under of The Prachuap Khiri Khan Primary Educational Service Area Office 2”. Journal of Research and Development Institute Rajabhat Maha Sarakham University 8, no. 1 (April 28, 2021): 621–634. Accessed May 5, 2024. https://so03.tci-thaijo.org/index.php/rdirmu/article/view/247704.