Febrian, Shahrin, Ayom Buwono, Muswar Muslim, Mohammad Danil Arifin, and Aldyn Clinton P. Oloan. 2022. “THE EFFECT OF USING MULTI LAYER MATERIAL ON DIESEL ENGINE SOUND ABSORBER CASE”. Jurnal Sains & Teknologi Fakultas Teknik Universitas Darma Persada 12 (2):72-77. https://doi.org/10.70746/jstunsada.v12i2.251.