Evaluasi Penerapan Sistem Manajemen Keselamatan dan Kesehatan Kerja (K3) pada Industri Galangan Kapal Kecil di Indonesia (Studi Kasus di PT. X, PT. Y, dan PT. Z) = Evaluation of the Implementation of the Occupational Safety and Health (OSH) Management System in the Small Shipyard Industry in Indonesia (Case Study PT. X, PT. Y, and PT. Z)