@book{821999,
	author = {Larson, Erik W. and Gray, Clifford F.},
	title = {Project management :},
	publisher = {McGraw-Hill,},
	year = {c2014.},
	address = {Boston, Mass. :},
	edition = {6th ed.},
	url = {http://www.nukat.edu.pl/nukat/icov/WALAZ/xx003226431.jpg}
}