Jannah, Na’imatul, and Much Fuad Saifuddin. “Problem-Based Blended Learning: The student’s Critical Thinking Skills in the Respiratory System Material”. Biosfer: Jurnal Pendidikan Biologi 17, no. 2 (October 31, 2024): 350–360. Accessed January 30, 2025. https://journal.unj.ac.id/unj/index.php/biosfer/article/view/36522.