Luhut Tumpal Parulian Sinaga. “KAJIAN TRANSPORTASI SUNGAI MENGGUNAKAN KAPAL SEMIKATAMARAN”. Majalah Ilmiah Pengkajian Industri; Journal of Industrial Research and Innovation 11, no. 2 (September 13, 2023): 145–154. Accessed November 21, 2024. https://ejournal.brin.go.id/MIPI/article/view/1561.