@book{50638,
	author = {Rust, John and Golombok, Susan},
	title = {Modern psychometrics :},
	publisher = {Routledge,},
	year = {2009},
	address = {Hove, East Sussex ;},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0821/2008023482.html}
}