“The Maritime Historical Background Of Bogak Port (8-20 Century), Tanjung Tiram District, Batubara Regency, North Sumatera Province”. International Journal of Culture and Art Studies 1, no. 1 (October 1, 2018): 28–35. Accessed February 4, 2026. https://idjpcr.usu.ac.id/ijcas/article/view/452.