Damanik, R., D. Nababan, and M. E. J. Sitorus. “Environmental Sanitation Assessment and the Presence of Rats in Belawan Seaport, Port Health Office, Medan ”. HIGIENE: Jurnal Kesehatan Lingkungan, Vol. 8, no. 3, Feb. 2023, pp. 130-5, doi:10.24252/higiene.v8i3.31960.