Prasetyo, A. B., & Setiono, B. A. (2020). The Effect of Covid-19 on Productivity of Loading and Unloading at BUP PT. DABN Probolinggo Branch. JURNAL APLIKASI PELAYARAN DAN KEPELABUHANAN, 11(1), 75–85. https://doi.org/10.30649/japk.v11i1.63