Ratnawita, R., S. M. T. Pandiangan, A. B. Pratomo, E. K. Saputra, and U. W. Nuryanto. “Analysis of the Experience of Teachers on Student Achievement in Economics at Private High School”. Edumaspul: Jurnal Pendidikan, Vol. 7, no. 1, Mar. 2023, pp. 522-6, https://ummaspul.e-journal.id/maspuljr/article/view/5555.