Febrian, Shahrin, Ayom Buwono, Muswar Muslim, Mohammad Danil Arifin, dan Aldyn Clinton Partahi Oloan. “THE EFFECT OF USING MULTI LAYER MATERIALON DIESEL ENGINE SOUND ABSORBER CASE”. Jurnal Sains & Teknologi Fakultas Teknik Universitas Darma Persada 12, no. 2 (September 5, 2022): 72–77. Diakses Juli 30, 2026. https://jst.unsada.ac.id/index.php/jst/article/view/127.