แสวงดิษฐ์ อนันต์. “English Language Learning and Instruction System (ELLIS)”. Parichart Journal 30, no. 3 (October 9, 2017): 146–155. Accessed May 6, 2024. https://so05.tci-thaijo.org/index.php/parichartjournal/article/view/101072.