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.