MICHAEL, E. P. (1991). Michael E. Porter On Competition And Strategy. Harvard Business School Pess.
Chicago-viite (17. p.)MICHAEL, E Porter. Michael E. Porter On Competition And Strategy. Harvard Business School Pess, 1991.
MLA-viite (8. p.)MICHAEL, E Porter. Michael E. Porter On Competition And Strategy. Harvard Business School Pess, 1991.
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