SIAGIAN, A. R.; JUNITA AMALIA; REGINA AYUNITA TARIGAN; SAHAT PANDAPOTAN NAINGGOLAN; YOLI AGNESIA. Optimalisasi Kemampuan Matematika Siswa Toba Melalui Kompetisi Del Mathematics And Science 2022. Jurnal Pengabdian Masyarakat Mandira Cendikia, [S. l.], v. 3, n. 6, p. 30–36, 2024. Disponível em: https://journal.mandiracendikia.com/index.php/pkm/article/view/1145. Acesso em: 12 sep. 2025.