Sijabat, Cindy Beauty, and Sunday Noya. “Application Of Hira And Spar-H Method To Control Work Accident”. Jurnal Teknik Industri 15, no. 1 (November 7, 2014): 70–79. Accessed July 3, 2024. https://ejournal.umm.ac.id/index.php/industri/article/view/2080.