AZIZAH RAHMAWATI PUTRI; RINI HAYATI. PENGARUH LAYANAN INFORMASI ETIKA BERBICARA TERHADAP PERILAKU SOPAN SANTUN SISWA DI SMA NEGERI 21 MEDAN. Jurnal Penelitian Pendidikan Indonesia (JPPI), Indonesia, v. 1, n. 3, p. 165–171, 2024. DOI: 10.62017/jppi.v1i3.1022. Disponível em: https://jurnalistiqomah.org/index.php/jppi/article/view/1022.. Acesso em: 17 jul. 2025.