Helga, Jil, dkk. “STRATEGY TO REDUCE COAL HAULING CYCLE TIME TO INCREASE THE PRODUCTIVITY IN PT ADARO INDONESIA”. JPIM (Jurnal Penelitian Ilmu Manajemen), vol. 8, no. 2, Juni 2023, hlm. 266-82, doi:10.30736/jpim.v8i2.1605.