Sari, Rani Purnama, and Lisa Deswati. “Analysis of External and Internal Factors Causes of Student Learning Difficulties and Their Relation to Biology Learning Outcome in MAN 3 Padang”. Journal of Biology Learning 5, no. 1 (March 30, 2023): 08–11. Accessed May 11, 2024. https://journal.univetbantara.ac.id/index.php/jbl/article/view/2769.