@book {4906,
	title = {Wsp{\'o}{\l}czesne problemy zarz{\k a}dzania i ekonomii},
	year = {2015},
	pages = {292},
	publisher = {Wydawnictwo Poltext},
	organization = {Wydawnictwo Poltext},
	isbn = {978-83-7561-628-6}
}
