Moothummachai, N., and N. . Kamol. “PROMOTING MATHEMATICAL REASONING ABILITIES BY USING MATHEMATICAL TASKS: CLASSROOM ACTION RESEARCH”. Journal of Education and Innovation, vol. 22, no. 2, Feb. 2020, pp. 135-46, https://so06.tci-thaijo.org/index.php/edujournal_nu/article/view/101211.