@book{21292,
	author = {Smith, Emma. and ebrary, Inc.},
	title = {Using secondary data in educational and social research},
	publisher = {Open University Press ;},
	year = {c2008, 2006.},
	series = {Conducting educational research},
	address = {Maidenhead, England :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10274052}
}