@book{3930,
	author = {Champion, Darl H. and Hooper, Michael},
	title = {Introduction to American policing /},
	publisher = {Glencoe McGraw-Hill,},
	year = {c2003},
	address = {New York :},
	url = {http://www.loc.gov/catdir/description/mh031/2003268104.html}
}