Natchanit Udomsub และผู้แต่งคนอื่นๆ. (2010) Process improvement of extranets maintenance to reduce potential loss of revenues from web-restricted segment :. Silpakorn University:ม.ป.ท.Natchanit Udomsub และผู้แต่งคนอื่นๆ. 2010. Process improvement of extranets maintenance to reduce potential loss of revenues from web-restricted segment :. ม.ป.ท.:Silpakorn University;Natchanit Udomsub และผู้แต่งคนอื่นๆ. Process improvement of extranets maintenance to reduce potential loss of revenues from web-restricted segment :. ม.ป.ท.:Silpakorn University, 2010. Print.