Nasution NS, Chastanti I, Harahap DA. PROFILE OF STUDENTS DIFFICULTY IN BIOLOGY LEARNING DURING PANDEMIC COVID-19 IN SMA NEGERI 1 SILANGKITANG. Jurnal Pelita Pendidikan [Internet]. 31 Maret 2021 [dikutip 12 Juli 2025];9(1). Tersedia pada: https://jurnal.unimed.ac.id/2012/index.php/pelita/article/view/22205