SAFITRI, E.; SISCA WULANDARI. CASE STUDY AT SD MUHAMMADIYAH 33 Tangerang: LACK OF MANNERS, IMPOLITENESS, AND SELFISHNESS PROBLEM OF CLASS 6 STUDENT. Proceeding Internasional Conference on Child Education, [S. l.], v. 1, n. 2, 2023. Disponível em: https://proceeding.unimar.ac.id/index.php/icce/article/view/68. Acesso em: 4 jul. 2025.