@book{351667,
	author = {Krueger, Richard A.},
	title = {Focus groups :},
	publisher = {Sage Publications,},
	year = {c1988.},
	address = {Newbury Park, Calif. :},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy0654/87033413-d.html}
}