Kongrat, Chedtharat. “Flipped Classroom: Thai Language Learning Management to Develop Learners in the Next Normal Era”. Ratchaphruek Journal 20, no. 2 (August 3, 2022): 1–15. accessed August 26, 2026. https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/256423.