Pramual, Wanwisa, and Romtheera Siriphongworakun. 2021. “Professional Learning Community Development in Literature Integration Learning to Enhance Conceptual Thinking Skill of Mathayomsueksa 3 Mahasarakham University Demonstration School (secondary)”. Journal of Research and Development Institute Rajabhat Maha Sarakham University 8 (1):463-78. https://so03.tci-thaijo.org/index.php/rdirmu/article/view/246680.