@book{132549,
	author = {Cramer, Duncan, and ebrary, Inc.},
	title = {Advanced quantitative data analysis},
	publisher = {Open University Press,},
	year = {2003.},
	series = {Understanding social research},
	address = {Philadelphia, PA :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10161281}
}