Pattiya, J. and Chaiyasuk, D. (2023) “Exploring the Roles of the L2 Motivational Self System in the English Learning Achievement of Thai High School Learners”, KKU Research Journal (Graduate Studies) Humanities and Social Sciences, 10(3), pp. 19–32. available at: https://so04.tci-thaijo.org/index.php/gskkuhs/article/view/261045 (accessed: 6 December 2025).