Brenhard Mangatur Tampubolon, Larsen Barasa, Aji Permana, Nurul Wahyuni, and Jaja Suparman. 2025. “Tugboat Clearance SOP Enhancement for Maritime Port Service Quality”. Harmony Management: International Journal of Management Science and Business 2 (3):106-13. https://doi.org/10.70062/harmonymanagement.v2i3.363.