Komala, Ratna, Erna Heryanti, and Amelia Rinawati. “Effect of Problem-Based Learning Model on Biodiversity Problem-Solving Skills”. Biosfer: Jurnal Pendidikan Biologi 14, no. 1 (May 22, 2021): 120-131. Accessed December 14, 2025. http://103.8.12.212:33180/unj/index.php/biosfer/article/view/16325.