Gaya APA
      Kotter, J, P., Whitehead, L, A. (2010).
    Buy-in : saving your good idea from being shot down (1).
    Boston:
  Harvard Business Review Press.
  
Gaya MLA
      Kotter, John, P.., Whitehead, Lorne, A..
    "Buy-in : saving your good idea from being shot down".
    1
    Boston:
  Harvard Business Review Press,
  2010.
  Hardcopy (Textbook).