@book{14805,
	author = {Brinberg, David. and McGrath, Joseph Edward,},
	title = {Validity and the research process /},
	publisher = {Sage Publications,},
	year = {c1985.},
	address = {Beverly Hills :},
	note = {Includes indexes.},
	url = {http://www.loc.gov/catdir/enhancements/fy0654/85001903-d.html}
}