@Book{WASSA:2015,
  editor    = {Alexandra Balahur  and  Erik van der Goot  and  Piek Vossen  and  Andres Montoyo},
  title     = {Proceedings of the 6th Workshop on Computational Approaches to Subjectivity, Sentiment and Social Media Analysis},
  month     = {September},
  year      = {2015},
  address   = {Lisboa, Portugal},
  publisher = {Association for Computational Linguistics},
  url       = {http://aclweb.org/anthology/W15-29}
}