Lakhamja R, Tachom K. 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 [internet]. 2020 Mar. 23 [cited 2026 Sep. 28];6(2):39-60. available from: https://so05.tci-thaijo.org/index.php/hssnsru/article/view/240726