Suephatthima, Bureerat, and Assoc. Prof. Poompipat Rukponmongkol. 2022. “The Development of Professional Learning Community for Supervision for Small - Sized Secondary Schools in Lower North, Thailand”. International Journal of Social Sciences: Current and Future Research Trends 13 (1):15-27. https://ijsscfrtjournal.isrra.org/index.php/Social_Science_Journal/article/view/935.