Tungsujarittam, N., and J. Intrasai. “Quality Evaluation of The English Proficiency Test for Automotive Specification Certificate Students at Nakhonsawan Technical College”. LEARN Journal: Language Education and Acquisition Research Network, vol. 7, no. 2, Dec. 2014, pp. 19-35, https://so04.tci-thaijo.org/index.php/LEARN/article/view/102697.