PORTER, M. E. (1990). The Competitive Advantage Of Nation Michael E. Porter. the Free Press.
Lua i Stíl Chicago (17ú heag.)PORTER, Michael E. The Competitive Advantage Of Nation Michael E. Porter. the Free Press, 1990.
Lua MLA (8ú heag.)PORTER, Michael E. The Competitive Advantage Of Nation Michael E. Porter. the Free Press, 1990.
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