Rahmayani, Wanda, dan Dina Handayani. “Differences in Student Learning Outcomes Between Problem-Based Learning and Direct Instruction Models in Ecosystem Material”. Magistra : Jurnal Keguruan dan Ilmu Pendidikan 12, no. 2 (Oktober 17, 2025). Diakses Oktober 23, 2025. https://journalmagistra.org/index.php/magistra/article/view/90.