APA Style
      Ahrens,Petra, . et al (2022).
    European Parliament’s Political Groups in Turbulent Times .
    Palgrave Macmillan Cham:
  Palgrave Macmillan Cham.
  
MLA Style
      Ahrens,Petra, . et al.
    "European Parliament’s Political Groups in Turbulent Times".
    
    Palgrave Macmillan Cham:
  Palgrave Macmillan Cham,
  2022.
  Text.