Puttidirok, A. “A Development of English Speaking Skills for Everyday With Communicative Language Teaching (CLT) of First Year Special Education and Thai Language Major Students in the Faculty of Education Rajabhat Maha Sarakham University”. Academic Journal of Mahamakut Buddhist University Roi Et Campus, vol. 10, no. 2, Apr. 2021, pp. 570-81, https://so01.tci-thaijo.org/index.php/AJMBU/article/view/246078.