Kamput, Thayawadee. “Development of English Communication Skills to Enhance Confidence and Quality of Service for Taxi Drivers in the Bangkok Metropolitan Region”. Rajapark Journal 16, no. 45 (April 5, 2022): 47–65. Accessed April 18, 2024. https://so05.tci-thaijo.org/index.php/RJPJ/article/view/255756.