@book{120690,
	author = {Onstott, Scott. and ebrary, Inc.},
	title = {AutoCAD 2912 and AutoCAD LT 2012 essentials},
	publisher = {Wiley Pub.,},
	year = {2011.},
	series = {Autodesk official training guide},
	address = {Indianapolis, Ind. :},
	edition = {1st ed.},
	note = {"AutoDesk certification preparation"--Cover.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10484630}
}