Nuntawan Chalermpanchai และ Petcharat Pongcharoensuk. (2012) Economic and clinical outcomes of easy asthma and chronic obstructive pulmonary desease clinic at wangtiong hospital, phitsanulok. Mahidol University:ม.ป.ท.Nuntawan Chalermpanchai และ Petcharat Pongcharoensuk. 2012. Economic and clinical outcomes of easy asthma and chronic obstructive pulmonary desease clinic at wangtiong hospital, phitsanulok. ม.ป.ท.:Mahidol University;Nuntawan Chalermpanchai และ Petcharat Pongcharoensuk. Economic and clinical outcomes of easy asthma and chronic obstructive pulmonary desease clinic at wangtiong hospital, phitsanulok. ม.ป.ท.:Mahidol University, 2012. Print.