Chariya Gumpee และผู้แต่งคนอื่นๆ. (2010) Investigate the effectiveness of internal communication channels in Sheraton Vistana Villages, Orlando, Florida. Silpakorn University:ม.ป.ท.Chariya Gumpee และผู้แต่งคนอื่นๆ. 2010. Investigate the effectiveness of internal communication channels in Sheraton Vistana Villages, Orlando, Florida. ม.ป.ท.:Silpakorn University;Chariya Gumpee และผู้แต่งคนอื่นๆ. Investigate the effectiveness of internal communication channels in Sheraton Vistana Villages, Orlando, Florida. ม.ป.ท.:Silpakorn University, 2010. Print.