Kongsaen, K. ., & Onthanee, A. . (2022). The Delvelopment of Learning Activities Based on Flipped Classroom to Promote English Listening and Speaking Proficiency for Grade 6. Academic MCU Buriram Journal, 7(1), 115–129. Retrieved from https://so06.tci-thaijo.org/index.php/ambj/article/view/251311