@book{227726,
	author = {Armstrong, Helen, and ebrary, Inc.},
	title = {Graphic design theory},
	publisher = {Princeton Architectural Press,},
	year = {c2009.},
	series = {Design briefs},
	address = {New York :},
	edition = {1st ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10453758}
}