ASMARA, Yeni. LUBUKLINGGAU’S ULU ALPHABET AND ITS PRESERVATION. ISTORIA : Jurnal Pendidikan dan Ilmu Sejarah, [S. l.], v. 15, n. 1, 2019. DOI: 10.21831/istoria.v15i1.24156. Disponível em: https://journal.uny.ac.id/index.php/istoria/article/view/24156. Acesso em: 9 may. 2025.