Unika Tri Pangestuti, Dwi Sulistyaningsih, and Eko Andy Purnomo. “Analysis of The Need for Electronic Teaching Materials on the Topics of Relations and Function for Grade VIII”. Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika 8, no. 1 (January 29, 2025): 336–348. Accessed July 8, 2025. https://www.e-journal.my.id/proximal/article/view/5181.