Gaya APA
      Kolter, P., Armstrong, G. (1994).
    Principles of marketing prentice hall international editions (SIXTH).
    mexico:
  Free Press.
  
Gaya MLA
      Kolter, Philip., Armstrong, Gary.
    "Principles of marketing prentice hall international editions".
    SIXTH
    mexico:
  Free Press,
  1994.
  Manajemen Administrasi D3.