@book{57504,
	author = {Miller, Delbert Charles, and Salkind, Neil J.},
	title = {Handbook of research design & social measurement /},
	publisher = {Sage Publications,},
	year = {c2002.},
	address = {Thousand Oaks, Calif. :},
	edition = {6th ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0658/2001006672-d.html}
}