@book{40,
	author = {Besley, Timothy. and Persson, Torsten.},
	title = {Pillars of prosperity :},
	publisher = {Princeton University Press,},
	year = {c 2011.},
	series = {The Yrjö Jahnsson lectures},
	address = {Princeton :},
	url = {http://www.loc.gov/catdir/enhancements/fy1201/2011016080-b.html}
}