HERIZAL, Herizal. Penguatan Konsep Kombinatorika Siswa SMAN 1 Muara Batu Kabupaten Aceh Utara dalam Menghadapi KSN-K Bidang Matematika 2021. Jurnal Pengabdian UNDIKMA, [S. l.], v. 2, n. 2, p. 174–181, 2021. DOI: 10.33394/jpu.v2i2.4207. Disponível em: https://e-journal3.undikma.ac.id/index.php/jpu/article/view/4207. Acesso em: 18 aug. 2025.