tata, tatamustikadewi, Rusmin Saragih, and Siswan Syahputra. “Implementation Of Data Mining Grouping Of Old Age Guarantee (Jht) Based On Region In Pandemic Period”. Journal of Information Systems and Technology Research 1, no. 2 (May 31, 2022): 112–123. Accessed February 11, 2026. https://journal.aira.or.id/jistr/article/view/136.