น้ำใจดี ส., ปัญญา ผ. ด., and วรคำ ผ. ด. “The Development Process of English Listening-Speaking Skills through Multimedia for Prathomsuksa IV Students”. Academic Journal of Mahamakut Buddhist University Roi Et Campus, vol. 8, no. 2, Sept. 2018, pp. 100-12, https://so01.tci-thaijo.org/index.php/AJMBU/article/view/228779.