Sitorus, Erwin, and Nurhikmah Alfath. “OPTIMASI JUMLAH TENAGA KERJA BERDASARKAN WAKTU STANDARD”. Jurnal Sistem Teknik Industri 19, no. 2 (August 18, 2018): 10-14. Accessed May 18, 2024. https://talenta.usu.ac.id/jsti/article/view/368.