Analisis Program Konservasi Orangutan Sumatera oleh Yayasan Orangutan Sumatera Lestari di Kabupaten Langkat. Journal of Future Social Humanities and Cultural Evolution, [S. l.], v. 1, n. 2, p. 332–344, 2026. DOI: 10.65244/jfshe.v1i2.920. Disponível em: https://ejournal.lppnusantara.com/index.php/jfshe/article/view/920. Acesso em: 22 aug. 2026.