@book{6557,
	author = {Birren, James E.},
	title = {Handbook of the psychology of aging /},
	publisher = {Academic Press,},
	year = {1996.},
	address = {San Diego :},
	edition = {4th ed.},
	url = {http://www.loc.gov/catdir/description/els032/95019905.html}
}