HERMAN. OPTIMALISASI LINGKUNGAN SEKITAR SEBAGAI SUMBER BELAJAR IPS. Jurnal Paris Langkis, [S. l.], v. 3, n. 1, p. 85–92, 2022. DOI: 10.37304/paris.v3i1.3379. Disponível em: https://e-journal.upr.ac.id/index.php/parislangkis/article/view/3379. Acesso em: 22 jul. 2024.