Sidjabat, Filson Maratur, Risalatul Habibah, and Martogi Pasaribu. 2019. “Comparative Analysis of Quality and Environmental Management Strategic Implementation in Cement Industry”. Media Ilmiah Teknik Lingkungan (MITL) 4 (2):58-70. https://doi.org/10.33084/mitl.v4i2.1072.