Advances in Soft and Hard Computing
  MLA
  PejaÅ›, et al. Advances In Soft and Hard Computing. Springer International Publishing, 2019.
  APA
  PejaÅ›, P., El Fray, I., Hyla, T., & Kacprzyk, J. (2019). Advances in Soft and Hard Computing. Springer International Publishing.
  Chicago
  PejaÅ›, Imed El Fray, Tomasz Hyla, and Janusz Kacprzyk. Advances In Soft and Hard Computing. : Springer International Publishing, 2019.