สิทธิ์สูงเนิน ชนสิทธิ์. “FLIPPED CLASSROOM : LEARNING SKILL IN CENTURY 21ST”. Journal of MCU Social Science Review 6, no. 2-05 (May 16, 2017): 171–182. Accessed May 14, 2024. https://so03.tci-thaijo.org/index.php/jssr/article/view/239804.