Development of EKSIS (ebook ekosistem) to introduce the ecosystem concept in class 3 elementary school. Primary: Jurnal Pendidikan Guru Sekolah Dasar, [S. l.], v. 13, n. 5, p. 224–233, 2024. DOI: 10.33578/ep3d7c44. Disponível em: https://ajoas.ejournal.unri.ac.id/index.php/primary/article/view/1791. Acesso em: 20 apr. 2025.