APA Style
      SASTALLA, , I. et al (2016).
    Bacterial Exotoxins : how bacteria fight the immune system .
    :
  National Library of Medicine.
  
MLA Style
      SASTALLA, , Inka. et al.
    "Bacterial Exotoxins : how bacteria fight the immune system".
    
    :
  National Library of Medicine,
  2016.
  Text.