“Optimizing Student Extracurricular Classification: RapidMiner Based K-Means Clustering Study at Darunnajah High School”, JOISTECH, vol. 1, no. 1, pp. 25–31, Jun. 2024, Accessed: Jul. 25, 2026. Available: https://ejournal.darunnajah.ac.id/index.php/joistech/article/view/251