ALHADDAD, Idrus. PERKEMBANGAN PEMBELAJARAN MATEMATIKA MASA KINI. Delta-Pi: Jurnal Matematika dan Pendidikan Matematika, [S. l.], v. 4, n. 1, 2016. DOI: 10.33387/dpi.v4i1.141. Disponível em: https://ejournal.xternate.com/index.php/deltapi/article/view/141. Acesso em: 12 jul. 2026.