Safitri, E. and Sisca Wulandari (2023) “CASE STUDY AT SD MUHAMMADIYAH 33 Tangerang: LACK OF MANNERS, IMPOLITENESS, AND SELFISHNESS PROBLEM OF CLASS 6 STUDENT”, Proceeding Internasional Conference on Child Education, 1(2). Available at: https://proceeding.unimar.ac.id/index.php/icce/article/view/68 (Accessed: 4 July 2025).