Vilianni, Agustin, and Unggul Kustiawan. “Risk Management Process of ‘Mining Contractors Services Company’ In Indonesia”. Jurnal Pendidikan Tambusai 7, no. 2 (July 8, 2023): 9420–9430. Accessed July 10, 2025. https://jptam.org/index.php/jptam/article/view/7752.