Gaya APA
Porter, Michael E.. (1998).
Competitive Strategy .
New York:
The Free Press.
Gaya Chicago
Porter, Michael E..
Competitive Strategy.
New York:
The Free Press,
1998.
.
Gaya MLA
Porter, Michael E..
Competitive Strategy.
New York:
The Free Press,
1998.
.
Gaya Turabian
Porter, Michael E..
Competitive Strategy.
New York:
The Free Press,
1998.
.