PORTER, M. E. (1983). Cases in competitive strategy. The Free Press.
Cita Chicago (17th ed.)PORTER, Michael E. Cases in Competitive Strategy. New York: The Free Press, 1983.
Cita MLA (9th ed.)PORTER, Michael E. Cases in Competitive Strategy. The Free Press, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.