Sihombing, Mailin Sonia Gira, dan Hendro Pranoto. “ANALYSIS OF STUDENTS’ LEARNING DIFFICULTIES IN PROTIST MATERIAL”. Jurnal Pelita Pendidikan 9, no. 3 (Oktober 4, 2021). Diakses Juli 17, 2025. https://jurnal.unimed.ac.id/2012/index.php/pelita/article/view/24436.