MELISA, Melisa. ANALISIS PERMAINAN EMPAT BILANGAN. UJMC (Unisda Journal of Mathematics and Computer Science), [S. l.], v. 2, n. 1, p. 22–27, 2016. DOI: 10.52166/ujmc.v2i1.445. Disponível em: https://ejournal.unisda.ac.id/index.php/ujmc/article/view/445. Acesso em: 5 jun. 2026.