Hulu, Omerina, Arwan Karier Harefa, and Indah Permata Sari Lase. “PENGARUH PANDEMI COVID-19 TERHADAP AKTIVITAS BELAJAR SISWA DI SMP NEGERI 4 BORONADU”. Curve Elasticity: Jurnal Pendidikan Ekonomi 3, no. 1 (February 25, 2022): 12-24. Accessed July 7, 2025. https://www.jurnal.uniraya.ac.id/index.php/JPE/article/view/468.