@book{123103,
	author = {Martínez Gutiérrez, Emilio. },
	title = {Maurice Halbwachs : },
	publisher = {CIS, Centro de Investigaciones Sociológicas,},
	year = {2008.},
	address = {Madrid :},
	edition = {primera edición },
	url = {http://www.loc.gov/catdir/enhancements/fy0910/2009390341-d.html}
}