APA Style
      BUTTLE, Francis, WAHYUDI, Setiyono. (2007).
    Customer Relationship Management : Concepts and Tools .
    Jakarta:
  Elsevier.
  
Chicago Style
      BUTTLE, Francis, WAHYUDI, Setiyono.
    Customer Relationship Management : Concepts and Tools.
    
    Jakarta:
  Elsevier,
  2007.
  .
  
MLA Style
      BUTTLE, Francis, WAHYUDI, Setiyono.
    Customer Relationship Management : Concepts and Tools.
    
    Jakarta:
  Elsevier,
  2007.
  .
  
Turabian Style
      BUTTLE, Francis, WAHYUDI, Setiyono.
    Customer Relationship Management : Concepts and Tools.
     
    Jakarta:
  Elsevier,
  2007.
  .