Kannika Numuang และผู้แต่งคนอื่นๆ. (2005) Cost-effectiveness analysis of dry powder inhaler and metered dose Inhaler with spacer in acute exacerbations of childhood asthma : a case study of King Chulalongkorn Memorial Hospital. Chulalongkorn University:ม.ป.ท.Kannika Numuang และผู้แต่งคนอื่นๆ. 2005. Cost-effectiveness analysis of dry powder inhaler and metered dose Inhaler with spacer in acute exacerbations of childhood asthma : a case study of King Chulalongkorn Memorial Hospital. ม.ป.ท.:Chulalongkorn University;Kannika Numuang และผู้แต่งคนอื่นๆ. Cost-effectiveness analysis of dry powder inhaler and metered dose Inhaler with spacer in acute exacerbations of childhood asthma : a case study of King Chulalongkorn Memorial Hospital. ม.ป.ท.:Chulalongkorn University, 2005. Print.