@book{249868,
	author = {Denning, Keith M. and Kessler, Brett, and ebrary, Inc.},
	title = {English vocabulary elements},
	publisher = {Oxford University Press,},
	year = {c2006.},
	address = {Oxford ;},
	edition = {2nd ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10171024}
}