Lakhamja , R. ., & Tachom, K. (2020). The Development of English Speaking Skills Using the Triangulation Teaching Techniques for Thai EFL Students: Preliminary Results. Humanities and Social Sciences Nakhonsawan Rajabhat University Academic Journal, 6(2), 39–60. Retrieved from https://so05.tci-thaijo.org/index.php/hssnsru/article/view/240726