Songnun , Sunantha, and Aumporn Lincharearn. “Development of the Measurement Scale on Critical Thinking Skills for Upper Elementary School Students under Phitsanulok Primary Educational Service Area Office”. Journal of Modern Learning Development 9, no. 3 (March 30, 2024): 107–123. Accessed May 18, 2024. https://so06.tci-thaijo.org/index.php/jomld/article/view/265216.