Prompatsorn Pattanapornchai และ Pranomporn Juangphanich. (2011) Effects of relaxation music on recovery period. Mahidol University:ม.ป.ท.Prompatsorn Pattanapornchai และ Pranomporn Juangphanich. 2011. Effects of relaxation music on recovery period. ม.ป.ท.:Mahidol University;Prompatsorn Pattanapornchai และ Pranomporn Juangphanich. Effects of relaxation music on recovery period. ม.ป.ท.:Mahidol University, 2011. Print.