[1] [CITE@EN[Voice Extensible Markup Language (VoiceXML) 3.0]] ([TIME[2008-12-16 04:20:32 +09:00]] 版)
[2] [CITE@EN[Voice Extensible Markup Language (VoiceXML) 3.0]]
([TIME[2009-12-03 04:09:08 +09:00]] 版)
[3] [CITE@EN[Voice Extensible Markup Language (VoiceXML) 3.0]]
( ([TIME[2010-12-15 06:11:47 +09:00]] 版))