Desy Lampita Rajagukguk, and Dwi Widayati. “Relationship of Batak Karo, Batak Toba, And Nias Comparative Historical Linguistic Study”. International Journal Of Humanities Education and Social Sciences (IJHESS) 1, no. 6 (June 27, 2022). Accessed May 22, 2026. https://ijhess.com/index.php/ijhess/article/view/192.