Wilman Jaya Ndruru. “SOSIALISASI PELAYANAN PENERBITAN SURAT PERSETUJUAN BERLAYAR DI PELABUHAN SIBOLGA”. Jurnal Pengabdian PenMaRim 3, no. 01 (July 13, 2025). Accessed June 15, 2026. https://www.samudrajurnal.id/index.php/penmarim/article/view/74.