@book{67664,
	author = {Avant, Deborah D.},
	title = {The market for force  the consequences of privatizing security},
	publisher = {Cambridge University Press},
	year = {2005},
	address = {Cambridge (Inglaterra)},
	url = {http://www.loc.gov/catdir/enhancements/fy0632/2005045377-t.html}
}