Pichai, Supailin, Dulachat Siriwallop, and Thosang Phimbaotham. 2025. “Clustering of ESTS Test Scores of Students in the Faculty of Science and Technology at Loei Rajabhat University”. KKU Science Journal 53 (3):401-21. https://doi.org/10.14456/kkuscij.2025.32.