Sitanggang, J. ., D. Dirhamsyah, and Irianif Sani. “TINJAUAN PROSES PELAYANAN JASA KAPAL PENUMPANG PADA PT. PELAYARAN NASIONAL INDONESIA CABANG MEDAN – BELAWAN”. Journal of Maritime and Education (JME), vol. 2, no. 1, July 2020, https://ejournal.poltek-amimedan.ac.id/index.php/jme/article/view/15.