Porter, M. E. (1998). The Competitive Advantage of Nations. Palgrave.
Cita Chicago (17th ed.)Porter, Michael E. The Competitive Advantage of Nations. New York: Palgrave, 1998.
Cita MLA (9th ed.)Porter, Michael E. The Competitive Advantage of Nations. Palgrave, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.