Syahputri, Khalida, Indah Rizkya, Rahmi Meilina Sari, and Albert Lo. “Implementation of 5S in Improving of Palm Oil Mill Working Environment”. Jurnal Sistem Teknik Industri 25, no. 1 (January 28, 2023): 18–24. Accessed August 11, 2025. https://idjpcr.usu.ac.id/jsti/article/view/8641.