@book{159585,
	author = {HUGHES, M. and (ED.)},
	title = {SOCIAL TRENDS NO. 39},
	publisher = {OFFICE FOR NATIONAL STATISTICS},
	year = {2009},
	address = {Londres},
	url = {\\Srvdatos\siis\docus\Documentos Internet\2008-Posteriores\2009\Social Trends 39.pdf}
}