Sidjabat, Filson Maratur, Risalatul Habibah, and Martogi Pasaribu. “Comparative Analysis of Quality and Environmental Management Strategic Implementation in Cement Industry”. Media Ilmiah Teknik Lingkungan (MITL) 4, no. 2 (August 7, 2019): 58–70. Accessed April 19, 2024. https://journal.umpr.ac.id/index.php/mitl/article/view/1072.