@book{228430,
	author = {Beukelman, David R. and Mirenda, Pat.},
	title = {Augmentative & alternative communication},
	publisher = {Paul H. Brookes Pub. Co.},
	year = {c2005},
	address = {Baltimore},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0511/2005011941.html}
}