@Book{SIGDIAL:2008,
  editor    = {David Schlangen  and  Beth Ann Hockey},
  title     = {Proceedings of the 9th SIGdial Workshop on Discourse and Dialogue},
  month     = {June},
  year      = {2008},
  address   = {Columbus, Ohio},
  publisher = {Association for Computational Linguistics},
  url       = {http://www.aclweb.org/anthology/W/W08/W08-01}
}