Fatima Pulungan, Aqila, dan Ari Widyanti. “Proposed Design Improvements for Earplugs Considering the Factors Affecting Their Comfort”. Journal of Research in Industrial Engineering and Management 3, no. 1 (Mei 31, 2025): 43–54. Diakses November 4, 2025. https://jriem.ti.fti.itb.ac.id/index.php/jriem/article/view/67.