?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Ngo%2C+Thi+Duyen&rft.aulast=Ngo&rft.aufirst=Thi+Duyen&rft.date=August+2012&rft.title=A+Study+on+Prosody+of+Vietnamese+Emotional+Speech&rft.genre=proceeding