Sumando Sinaga, et al. “ANALISIS TINGKAT KEBISINGAN (NOISE) PADA AREA FATTY ACID PHASE 1 DI PT PERMATA HIJAU PALM OLEO KIM II MABAR”. Journal of Innovation Research and Knowledge, vol. 5, no. 7, Dec. 2025, pp. 7879-86, doi:10.53625/jirk.v5i7.11818.