Boonsuwan, Sirilak, Supanit Areehathairat, Krissamant Wathananarong, and Nareerat Suwanvaree. “The Development of Multimedia Learning Program by Using Sound Waves Images to Practice English Pronunciation of Grade 4 Students”. Rajapark Journal 17, no. 52 (June 30, 2023): 388–403. Accessed May 20, 2024. https://so05.tci-thaijo.org/index.php/RJPJ/article/view/264998.