KARYADI, Bhakti. Pengembangan Model Bahan Ajar Pendidikan Lingkungan Berbasis Masalah untuk Siswa Sekolah Dasar. IJEEM - Indonesian Journal of Environmental Education and Management, [S. l.], v. 1, n. 1, p. 22–35, 2016. DOI: 10.21009/IJEEM.011.02. Disponível em: https://journal.unj.ac.id/unj/index.php/ijeem/article/view/3691. Acesso em: 6 nov. 2024.