Rumanintya Lisaria Putri 2018. APPLICATION JUST IN TIME METHOD WITH TRADITIONAL METHOD IN ENHANCING EFFICIENCY COST OF RAW MATERIALS: (STUDY ON UD. SIDO RUKUN). EKONOMIKA45 :  Jurnal Ilmiah Manajemen, Ekonomi Bisnis, Kewirausahaan. 5, 2 (Jun. 2018), 154–169.