@book{51611,
	author = {Judd, Charles M. and McClelland, Gary H.},
	title = {Data analysis :},
	publisher = {Routledge,},
	year = {2009},
	address = {New York ;},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0817/2008018371.html}
}