@book{52153,
	author = {Maxfield, Michael G. and Babbie, Earl R.},
	title = {Research methods for criminal justice and criminology /},
	publisher = {Wadsworth Cengage Learning,},
	year = {c2011.},
	address = {Belmont, CA :},
	edition = {6th ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy1303/2010927231-b.html}
}