L. P. Hati, F. Harahap, S. ., and M. Saidin, “The Maritime Historical Background Of Bogak Port (8-20 Century), Tanjung Tiram District, Batubara Regency, North Sumatera Province”, Internationalj.ofCultureandArtStudies, vol. 1, no. 1, pp. 28-35, Oct. 2018.