Charuwan Tadadej และผู้แต่งคนอื่นๆ. (2000) Patients' perception of quality hospital services : a study in four hospitals located in Metropolitan Bangkok. National Institute of Development Administration:ม.ป.ท.Charuwan Tadadej และผู้แต่งคนอื่นๆ. 2000. Patients' perception of quality hospital services : a study in four hospitals located in Metropolitan Bangkok. ม.ป.ท.:National Institute of Development Administration;Charuwan Tadadej และผู้แต่งคนอื่นๆ. Patients' perception of quality hospital services : a study in four hospitals located in Metropolitan Bangkok. ม.ป.ท.:National Institute of Development Administration, 2000. Print.