Tri Putri, C., P. F. Aulia, Y. Aisyah, and S. B. Hasibuan. “Class Management in Improving Achievement Student Learning”. Edumaspul: Jurnal Pendidikan, Vol. 6, no. 1, Mar. 2022, pp. 217-9, https://ummaspul.e-journal.id/maspuljr/article/view/3065.