@book{346,
	author = {Porter, Michael E.,},
	title = {Competitive advantage :},
	publisher = {Free Press,},
	year = {c1998},
	address = {New York :},
	edition = {1st Free Press ed.},
	note = {Originally published: New York : Free Press ; London : Collier Macmillan, c1985.},
	url = {http://www.loc.gov/catdir/bios/simon051/98009581.html}
}