INDRA, E. F.; ELIZA, D. Efektivitas Project Based Learning Terhadap Karakter Peduli Lingkungan Anak. Journal of Education Research, [S. l.], v. 5, n. 4, p. 5820–5833, 2024. DOI: 10.37985/jer.v5i4.1810. Disponível em: https://jer.or.id/index.php/jer/article/view/1810. Acesso em: 2 jul. 2025.