Meldrawati, Meldrawati, Erismar Amri, and Evrialiani Rosba. “Validitas E-Modul Berbasis Problem Based Learning Pada Materi Perubahan Lingkungan Kelas X SMA MA”. Bioscientist : Jurnal Ilmiah Biologi 11, no. 1 (June 30, 2023): 263–269. Accessed October 16, 2025. https://e-journal.undikma.ac.id/index.php/bioscientist/article/view/7326.