@book{18889,
	author = {Luke, Douglas A.},
	title = {Multilevel modeling /},
	publisher = {Sage Publications,},
	year = {c2004.},
	series = {Sage university papers. Quantitative applications in the social sciences ;},
	address = {Thousand Oaks, Calif. :},
	url = {http://www.loc.gov/catdir/toc/ecip0412/2003027811.html}
}