Prakobkiat Hirunwiwatkul และ Winai Wadwongtham. (2008) Efficacy and adverse effects of vessel sealing system tonsillectomy vs cold knief tosillectomy : a randomized, control study. Chulalongkorn University:ม.ป.ท.Prakobkiat Hirunwiwatkul และ Winai Wadwongtham. 2008. Efficacy and adverse effects of vessel sealing system tonsillectomy vs cold knief tosillectomy : a randomized, control study. ม.ป.ท.:Chulalongkorn University;Prakobkiat Hirunwiwatkul และ Winai Wadwongtham. Efficacy and adverse effects of vessel sealing system tonsillectomy vs cold knief tosillectomy : a randomized, control study. ม.ป.ท.:Chulalongkorn University, 2008. Print.