@book{153229,
	author = {Zimmerman, Wesley. and ebrary, Inc.},
	title = {Perception of a difference},
	publisher = {WZA, Inc.,},
	year = {c2005.},
	address = {Scottsdale, AZ :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10229695}
}