@book{4687,
	author = {Northern, Jerry L. and Downs, Marion P.},
	title = {Hearing in children /},
	publisher = {Lippincott Williams & Wilkins,},
	year = {c2002.},
	address = {Philadelphia, PA :},
	edition = {5th ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0711/2001038193-d.html}
}