Nukul Ploybutr และ Nuntavarn Vichit-Vadakan. (2002) The effectiveness of a pulmonary renabilitation program in patients with chronic obstructive pulmonary disease (COPD). Chulalongkorn University:ม.ป.ท.Nukul Ploybutr และ Nuntavarn Vichit-Vadakan. 2002. The effectiveness of a pulmonary renabilitation program in patients with chronic obstructive pulmonary disease (COPD). ม.ป.ท.:Chulalongkorn University;Nukul Ploybutr และ Nuntavarn Vichit-Vadakan. The effectiveness of a pulmonary renabilitation program in patients with chronic obstructive pulmonary disease (COPD). ม.ป.ท.:Chulalongkorn University, 2002. Print.