โบราณมูล ป. Self-Practice in Three Bases of Meritorious Action by Teachers of Roi Et Municipality Schools, Roi Et Province. JYRI [internet]. 2011 Jun. 28 [cited 2026 Sep. 29];2(1):53-62. available from: https://so04.tci-thaijo.org/index.php/yri/article/view/175029