Arnon Thepsilvisuthi และ Prasert Akkharaprathomphong. (2007) ROQI of a tire mould production improvement: A machine tool company case study. Chulalongkorn University:ม.ป.ท.Arnon Thepsilvisuthi และ Prasert Akkharaprathomphong. 2007. ROQI of a tire mould production improvement: A machine tool company case study. ม.ป.ท.:Chulalongkorn University;Arnon Thepsilvisuthi และ Prasert Akkharaprathomphong. ROQI of a tire mould production improvement: A machine tool company case study. ม.ป.ท.:Chulalongkorn University, 2007. Print.