APA Style
      ,Toshimitsu, H. et al (2015).
    Group-Sequential Clinical Trials with Multiple Co-Objectives .
    Tokyo:
  Springer Tokyo.
  
MLA Style
      ,Toshimitsu, HAMASAKI. et al.
    "Group-Sequential Clinical Trials with Multiple Co-Objectives".
    
    Tokyo:
  Springer Tokyo,
  2015.
  Text.