Cicilia Angelina Priska, and Yokhebed Yokhebed. “Problem Based Learning to Improve Students’ Problem Solving Skills on Environmental Change Material”. Journal of Biology Learning 6, no. 1 (March 30, 2024): 1–6. Accessed October 12, 2024. https://journal.univetbantara.ac.id/index.php/jbl/article/view/4593.