tongpool, Jiraporn, Pakornchai Supat, Methee Wisaprom, and Jittimaporn Sihawong. “Developing Capability of Thai Diphthong Reading with Active learning: GWM for Grade 4 Students, Khumkhamwittaya School, Sisaket Area Office 1”. Journal of Roi Et Rajabhat University 14, no. 1 (April 27, 2020): 3–14. accessed September 11, 2026. https://so03.tci-thaijo.org/index.php/reru/article/view/204162.