Chudech, P. “The Development of Thai spelling skill to improve Thai Spelling exercises for Chinese Students learning Thai as a foreign language at Huachiew Chalermprakiet University”. Academic and Research Journal of Liberal Arts (Online), vol. 16, no. 1, June 2021, pp. 16-26, https://so04.tci-thaijo.org/index.php/larhcu/article/view/243011.