Mudiyanto. “The Role of the ISM Code As Supporting Shipping Safety on Ships on Shipping Companies in Surabaya”. JURNAL APLIKASI PELAYARAN DAN KEPELABUHANAN 9, no. 1 (October 18, 2021). Accessed June 16, 2025. https://pdp-journal.hangtuah.ac.id/index.php/jurnal/article/view/37.