Siagian, A. R., Junita Amalia, Regina Ayunita Tarigan, Sahat Pandapotan Nainggolan, & Yoli Agnesia. (2024). Optimalisasi Kemampuan Matematika Siswa Toba Melalui Kompetisi Del Mathematics And Science 2022. Jurnal Pengabdian Masyarakat Mandira Cendikia, 3(6), 30–36. Retrieved from https://journal.mandiracendikia.com/index.php/pkm/article/view/1145