Yuliana and Poli, S. 2018. Ticket Service Satisfaction Analysis of Passenger KM. Sinabung in PT. Pelayaran Nasional Indonesia Surabaya Branch. JURNAL APLIKASI PELAYARAN DAN KEPELABUHANAN. 9, 1 (Sep. 2018), 74–83. DOI:https://doi.org/10.30649/japk.v9i1.44.