HUTASOIT, Imelda. Developing an Instructional Package of Environmental Education (EnMor Book) Based On Ecology In Improving Student’s Environmental Moral Behavior. IJEEM - Indonesian Journal of Environmental Education and Management, [S. l.], v. 2, n. 1, p. 38–43, 2017. DOI: 10.21009/IJEEM.021.03. Disponível em: https://journal.unj.ac.id/unj/index.php/ijeem/article/view/3709. Acesso em: 6 nov. 2024.