แก้วเนตร ณ., จุลสุวรรณ์ ส., and เทศบุตร โ. “A Teacher Development in Mathematics Learning Management by Applying the Concept of Professional Learning Community for Secondary Schools”. Journal of Graduate School, Pitchayatat, Ubon Ratchathani Rajabhat University, vol. 14, no. 2, Aug. 2019, pp. 33-41, https://so02.tci-thaijo.org/index.php/Pitchayatat/article/view/220903.