Gaya APA
Porter, Michael E.. (2008).
Competitive advantage : creating and sustaining superior performance .
New York:
The Free Press.
Gaya Chicago
Porter, Michael E..
Competitive advantage : creating and sustaining superior performance.
New York:
The Free Press,
2008.
Text.
Gaya MLA
Porter, Michael E..
Competitive advantage : creating and sustaining superior performance.
New York:
The Free Press,
2008.
Text.
Gaya Turabian
Porter, Michael E..
Competitive advantage : creating and sustaining superior performance.
New York:
The Free Press,
2008.
Print.