Gaya APA
PORTER, Michael E.. (1985).
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,
1985.
Text.
Gaya MLA
PORTER, Michael E..
Competitive advantage: creating and sustaining superior performance.
New York:
The Free Press,
1985.
Text.
Gaya Turabian
PORTER, Michael E..
Competitive advantage: creating and sustaining superior performance.
New York:
The Free Press,
1985.
Print.