Gaya APA
Porter, Michael E. (1990).
The competitive advantage of nations .
New York, NY:
Free Press.
Gaya Chicago
Porter, Michael E.
The competitive advantage of nations.
New York, NY:
Free Press,
1990.
Buku.
Gaya MLA
Porter, Michael E.
The competitive advantage of nations.
New York, NY:
Free Press,
1990.
Buku.
Gaya Turabian
Porter, Michael E.
The competitive advantage of nations.
New York, NY:
Free Press,
1990.
Buku.