Meldrawati, M., Amri, E., & Rosba, E. (2023). Validitas E-Modul Berbasis Problem Based Learning pada Materi Perubahan Lingkungan Kelas X SMA/MA. Bioscientist : Jurnal Ilmiah Biologi, 11(1), 263–269. https://doi.org/10.33394/bioscientist.v11i1.7326