Ubonnoi P, Yangklang P. The Development of English Speaking Skills using a Task-based Learning Approach Focused on Selling Local Products for the Ninth Grade Students. EDUCU [Internet]. 2021 Dec. 22 [cited 2024 May 3];49(4):EDUCU4904013(13 pages) doi: 10.14456/educu.2021.72. Available from: https://so02.tci-thaijo.org/index.php/EDUCU/article/view/253621