Thaipradit, K., and S. Thabthieng. “The Development of a Computer-Assisted Instruction in English Vocabulary for TOEIC Test Preparation”. Ratchaphruek Journal, vol. 18, no. 3, Dec. 2020, pp. 30-38, https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/226119.