Gaya APA
Porter, Michael E.. (1980).
Competitive strategy : techniques for analyzing industries and competitors .
New York:
The Free Press.
Gaya Chicago
Porter, Michael E..
Competitive strategy : techniques for analyzing industries and competitors.
New York:
The Free Press,
1980.
Text.
Gaya MLA
Porter, Michael E..
Competitive strategy : techniques for analyzing industries and competitors.
New York:
The Free Press,
1980.
Text.
Gaya Turabian
Porter, Michael E..
Competitive strategy : techniques for analyzing industries and competitors.
New York:
The Free Press,
1980.
Print.