Lemons, Ricky, and Samran Tao-ngoen. “Study of Phetchabun Rajabhat University Second and Third Year Students’ Listening and Speaking Difficulties in English Language”. Journal of Asian Language Teaching and Learning (Online) 5, no. 2 (August 30, 2024): 01–12. accessed April 25, 2025. https://so10.tci-thaijo.org/index.php/jote/article/view/1401.