Phumikron Viriyarungrong และผู้แต่งคนอื่นๆ. (2016) A critical evaluation of investment in an upstream business to supply the current production : a case study of metal shutter door productions. Chulalongkorn University:ม.ป.ท.Phumikron Viriyarungrong และผู้แต่งคนอื่นๆ. 2016. A critical evaluation of investment in an upstream business to supply the current production : a case study of metal shutter door productions. ม.ป.ท.:Chulalongkorn University;Phumikron Viriyarungrong และผู้แต่งคนอื่นๆ. A critical evaluation of investment in an upstream business to supply the current production : a case study of metal shutter door productions. ม.ป.ท.:Chulalongkorn University, 2016. Print.