Sriwichai, C., Duangfai, C., Paicharoen, N. and Yuensak, S. (2023) “A Development of English Proficiency Test for Undergraduate Students of the University of Phayao”, Trends of Humanities and Social Sciences Research, 11(2), pp. 123–142. available at: https://so03.tci-thaijo.org/index.php/Humanties-up/article/view/262725 (accessed: 4 October 2026).