Yulasri, R., S. Syahril, Y. Santoso, and T. Ningrum. “Disiplin Belajar Siswa Di SMK Negeri 2 Batusangkar”. Journal of Educational Administration and Leadership, Vol. 2, no. 3, Jan. 2022, pp. 312-6, doi:10.24036/jeal.v2i3.229.