Manalu S, Napitupulu B. 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]. KAIROS [Internet]. 2024 Feb. 1 [cited 2025 Feb. 5];4(1):57-76. Available from: https://ojs.uph.edu/index.php/KAIROS/article/view/7901