LUBIS, Silvi Puspa Widya; HANDIKA, Handika; SAMSUAR, Samsuar. Development e-module through problem-based learning on ecosystem concepts to improve environmental literacy . Biosfer: Jurnal Pendidikan Biologi, [S. l.], v. 19, n. 1, p. 370–381, 2026. DOI: 10.21009/biosferjpb.63603. Disponível em: https://journal.unj.ac.id/unj/index.php/biosfer/article/view/63603. Acesso em: 31 may. 2026.