APA Style
      PROKOPOWICZ, P. et al (2017).
    Theory and Applications of Ordered Fuzzy Numbers: A Tribute to Professor Witold Kosiński (1).
    Heidelberg, Jerman:
  Springer International Publishing.
  
MLA Style
      PROKOPOWICZ, Piotr. et al.
    "Theory and Applications of Ordered Fuzzy Numbers: A Tribute to Professor Witold Kosiński".
    1
    Heidelberg, Jerman:
  Springer International Publishing,
  2017.
  Text.