Hartana, Hartana. “EXISTENCE AND DEVELOPMENT GROUP COMPANIES IN THE MINING SECTOR (PT. BUMI RESOURCES Tbk)”. Ganesha Civic Education Journal 1, no. 1 (April 2, 2019): 12-23. Accessed November 24, 2024. https://ejournal2.undiksha.ac.id/index.php/GANCEJ/article/view/325.