มาเอโนะ ฟ., and ตั้งบุญธินา น. “Self-Assessment of Japanese Language Ability in Comparison With Self-Assessment Record and Test Scores”. Journal of Industrial Education, vol. 13, no. 2, Aug. 2014, pp. 12-18, https://ph01.tci-thaijo.org/index.php/JIE/article/view/26432.