JOHN, A. H. Behavior Of Individual Orangutan Sumatera (Pongo Abelii) Before Direintroduction At The Orangutan Quarantine Station, Sibolangit, Deli Serdang, North Sumatera. International Journal of Ecophysiology, [S. l.], v. 2, n. 02, p. 101–111, 2020. DOI: 10.32734/ijoep.v2i02.4677. Disponível em: https://idjpcr.usu.ac.id/ijoep/article/view/4677. Acesso em: 10 sep. 2025.