Fajarianingtyas, Dyah Ayu, Naufal Afif Akbar, and H Herowati. 2019. “Developing students’ Worksheet Based on Scientific Approach in Cell As the System of Life”. Biosfer: Jurnal Pendidikan Biologi 12 (1), 109 -21. https://doi.org/10.21009/biosferjpb.v12n1.109-121.