Wongwan, Pasutha, Simmee Oupra, and Somlak Liangprayoon. “Development of English Speaking Ability Baedsed on Communicative Language Teaching (CLT): Case Study in a Language Center”. Chophayom Journal 30, no. 3 (December 28, 2019): 73–82. Accessed April 28, 2024. https://so01.tci-thaijo.org/index.php/ejChophayom/article/view/216612.