Sitindaon, Charles, Riana Ledyanti Sinaga, and Andar Sitohang. 2022. “ANALISIS KINERJA PELAYANAN KAPAL MOTOR FERRY PENUMPANG DI DANAU TOBA”. ATDS Saintech Journal of Engineering 3 (2):22-37. https://ejournal.atds.ac.id/index.php/atdssaintech/article/view/26.