Purba, J. O., and S. Zetli. “ANALISIS INTENSITAS KEBISINGAN TERHADAP KELELAHA KERJA OPERATOR PRODUKSI DI PT EOB”. Computer and Science Industrial Engineering (COMASIE), vol. 5, no. 4, July 2021, pp. 122-34, https://ejournal.upbatam.ac.id/index.php/comasiejournal/article/view/4166.