Mursabdo, W., and M. C. Mursabdo. “The Effectiveness of Online Learning on The Absorbility of Class 9 Students of SMP Kristen Kanaan Jakarta”. Jurnal LENTERA: Jurnal Studi Pendidikan, Vol. 3, no. 2, July 2021, pp. 17-26, doi:10.51518/lentera.v3i2.49.