@book{40344,
	author = {Porter, Michael E. and Polskie Wydawnictwo Ekonomiczne},
	title = {Strategia konkurencji :},
	publisher = {Polskie Wydaw. Ekonomiczne,},
	year = {1998.},
	address = {Warszawa :},
	note = {Oryg. : "Competitive strategy : techniques for analyzing industries and competitors" 1980.},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=40344}
}