@book{36793,
	author = {Streiner, David L. and Norman, Geoffrey R.},
	title = {Health measurement scales},
	publisher = {Oxford University Press,},
	year = {2008.},
	address = {Oxford :},
	edition = {4th ed.},
	note = {Previous ed.: 2003.},
	url = {http://dx.doi.org/10.1093/acprof:oso/9780199231881.001.0001}
}