Kustiwansa, Harlian, Syamsul Asri, and Misliah Idrus. “Distance’s Effects on Ferry Ship’s Operating Costs”. Zona Laut Jurnal Inovasi Sains Dan Teknologi Kelautan 4, no. 1 (March 28, 2023): 1-13. Accessed May 17, 2024. http://journal.unhas.ac.id/index.php/zonalaut/article/view/25951.