Siswati, Bea Hana, and Suratno Suratno. 2023. “The Contribution of Cognitive Ability and Critical Thinking Skills on the Problem Solving Skills of Biology Education Profession Students Using Case Method Learning”. Biosfer: Jurnal Pendidikan Biologi 16 (2), 419-26. https://doi.org/10.21009/biosferjpb.34633.