Wises, Thasaphon, and Sayun Sotaro. “INSTRUCTIONAL ACTIVITY PACKAGE ON CONIC SECTIONS BY USING A TI–NSPIRE CX CAS GRAPHING CALCULATOR FOR MATTHAYOM 4 STUDENTS”. Journal of Industrial Education 18, no. 2 (August 25, 2019): 148–155. Accessed March 29, 2024. https://ph01.tci-thaijo.org/index.php/JIE/article/view/183242.