Ramadhan, W. F., Sudirman, S., & Saputra, T. D. (2025). Optimizing the Use of Ships in Time Charter to Increase the Efficiency of Coal Transportation at PT. Kartika Samudra Adijaya. JURNAL APLIKASI PELAYARAN DAN KEPELABUHANAN, 16(1), 65–73. https://doi.org/10.30649/japk.v16i1.177