MANALU, Selly; NAPITUPULU, Bernard. PENERAPAN PERATURAN DAN PROSEDUR KELAS SEBAGAI UPAYA MENGEMBANGKAN SIKAP DISIPLIN SISWA KELAS IX DALAM PEMBELAJARAN [THE IMPLEMENTATION OF CLASS RULES AND PROCEDURES AS AN EFFORT TO DEVELOP THE DISCIPLINE ATTITUDE OF CLASS IX STUDENTS IN LEARNING]. Kumpulan Artikel Ilmiah Rumpun Ekonomi dan Ilmu Sosial, [S. l.], v. 4, n. 1, p. 57–76, 2024. DOI: 10.19166/kairos.v4i1.7901. Disponível em: https://ojs.uph.edu/index.php/KAIROS/article/view/7901. Acesso em: 5 feb. 2025.