Siregar, Zufri Hasrudy, and Margie Subahagia Ningsih. “Implementasi Metode NIOSH Dan Analisa QEC Pada Alat Potong Ranting”. Operations Excellence: Journal of Applied Industrial Engineering, vol. 11, no. 1, Mar. 2019, pp. 34-48, doi:10.22441/oe.v11.1.2019.014.