Meliana, R., Manalu, M.M.S. and Triyono, S. 2024. Tracing the Linguistic Roots of Malay and Batak Languages in Sumatra Island: A Historical Comparative Study. OKARA: Jurnal Bahasa dan Sastra. 18, 1 (May 2024), 142-164. DOI:https://doi.org/10.19105/ojbs.v18i1.12865.