SRI HANDANI, HESTI; MADE ARNAWA, I; NOLIZA BAKAR, NOVA. EXTERNAL DAN INTERNAL DIRECT PRODUCTS PADA GRUP. Jurnal Matematika UNAND, [S. l.], v. 9, n. 4, p. 373–381, 2021. DOI: 10.25077/jmu.9.4.373-381.2020. Disponível em: https://jmua.fmipa.unand.ac.id/index.php/jmua/article/view/722. Acesso em: 5 nov. 2026.