Sugiyanto, Sugiyanto. “Analisis Kualitas SDM Dan Layanan Keagenan Perusahaan Pelayaran Nasional Di Indonesia”. Jurnal Manajemen Bisnis Transportasi dan Logistik 7, no. 2 (May 27, 2021). Accessed August 9, 2026. https://journal.itltrisakti.ac.id/index.php/jmbtl/article/view/659.