@book{18827,
	author = {Raudenbush, Stephen W. and Bryk, Anthony S.},
	title = {Hierarchical linear models :},
	publisher = {Sage Publications,},
	year = {c2002.},
	address = {Thousand Oaks :},
	edition = {2nd ed.},
	note = {Bryk's name appears first on the previous edition.},
	url = {http://www.loc.gov/catdir/enhancements/fy0658/2001057880-d.html}
}