Nukuea, Chutima, and Wipawan Wongsuwan Kongpao. “Effects of contextual teaching and learning-based instruction with digital learning tools on writing competency of upper secondary students”. Kasetsart Journal of Social Sciences 47, no. 3 (September 8, 2026): 470312. accessed September 17, 2026. https://so04.tci-thaijo.org/index.php/kjss/article/view/292608.