Tungsujarittam, Natanan, and Jiraporn Intrasai. 2014. “Quality Evaluation of The English Proficiency Test for Automotive Specification Certificate Students at Nakhonsawan Technical College”. LEARN Journal: Language Education and Acquisition Research Network 7 (2):19-35. https://so04.tci-thaijo.org/index.php/LEARN/article/view/102697.