Development of Digital Flipbook Ecosystem (DFE)-based Problem-Based Learning (PBL) to enhance critical thinking skills. EDUSAINS, [S. l.], v. 18, n. 1, p. 1–10, 2026. DOI: 10.15408/es.v18i1.49593. Disponível em: https://journal.uinjkt.ac.id/index.php/edusains/article/view/49593. Acesso em: 5 jul. 2026.