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/jpfkip-v13i5.p224-233. Disponível em: https://primary.ejournal.unri.ac.id/index.php/JPFKIP/article/view/36. Acesso em: 9 may. 2025.