Sutida Ngonkum, and Poranee Deerajviset. “Thai EFL University Students’ Engagement with CEFR: Perceived Proficiency, Awareness and Skill Development Requirement”. Journal of Mekong Societies 20, no. 3 (December 25, 2024): 185–211. accessed April 3, 2025. https://so03.tci-thaijo.org/index.php/mekongjournal/article/view/269443.