Pichai, S., Siriwallop, D. and Phimbaotham, T. 2025. Clustering of ESTS Test Scores of Students in the Faculty of Science and Technology at Loei Rajabhat University. KKU Science Journal. 53, 3 (Oct. 2025), 401–421. DOI:https://doi.org/10.14456/kkuscij.2025.32.