Soulaxay Keokhamphan และ Chaiya Chamchoy. (2010) Power system harmonic analysis programs for power quality teaching and studying/. Chulalongkorn University,:ม.ป.ท.Soulaxay Keokhamphan และ Chaiya Chamchoy. 2010. Power system harmonic analysis programs for power quality teaching and studying/. ม.ป.ท.:Chulalongkorn University,;Soulaxay Keokhamphan และ Chaiya Chamchoy. Power system harmonic analysis programs for power quality teaching and studying/. ม.ป.ท.:Chulalongkorn University, 2010. Print.