Damanik, Roynaldo, Donal Nababan, and Mido Ester J. Sitorus. “Environmental Sanitation Assessment and the Presence of Rats in Belawan Seaport, Port Health Office, Medan ”. HIGIENE: Jurnal Kesehatan Lingkungan 8, no. 3 (February 1, 2023): 130-135. Accessed November 10, 2024. https://journal3.uin-alauddin.ac.id/index.php/higiene/article/view/31960.