Metpattarahiran, C. “Flipped Classroom as a Pedagogical Approach for the Development of Mathematics Instruction for Learning in the 21st Century”. Journal of Multidisciplinary in Social Sciences, vol. 16, no. 1, May 2023, pp. 81-85, https://so03.tci-thaijo.org/index.php/sduhs/article/view/268110.