APA Style
      Kryszkiewicz, M. et al (2015).
    Pattern Recognition and Machine Intelligence, 6th International Conference, PReMI 2015, Warsaw, Poland, June 30 - July 3, 2015, Proceedings (Vol. 9124).
    Warsaw:
  Springer International Publishing.
  
MLA Style
      Kryszkiewicz, Marzena. et al.
    "Pattern Recognition and Machine Intelligence, 6th International Conference, PReMI 2015, Warsaw, Poland, June 30 - July 3, 2015, Proceedings".
    Vol. 9124
    Warsaw:
  Springer International Publishing,
  2015.
  Text.