Samuel Nainggolan, J., and S. Zetli. “ANALISA KELELAHAN KERJA PADA PEKERJA BAGIAN GUDANG DI PT. NOK FREUDENBERG SEALING TECHNOLOGIES BATAM”. Computer and Science Industrial Engineering (COMASIE), vol. 6, no. 3, Jan. 2022, pp. 50-59, https://ejournal.upbatam.ac.id/index.php/comasiejournal/article/view/5173.