Khamngoen, Sujinta, Lumyai Seehamat, and Ketsaraphan Punsriket Khongjaroen. “The Knowledge Synthesis of English Teaching Based on Content and Language Integrated Learning Approach (CLIL)”. Journal of Roi Et Rajabhat University 14, no. 1 (April 27, 2020): 249-260. Accessed August 2, 2021. https://so03.tci-thaijo.org/index.php/reru/article/view/197717.