@book{592424,
	author = {Hart, H. L. A.},
	title = {The concept of law /},
	publisher = {Oxford University Press,},
	year = {2012.},
	series = {Clarendon law series},
	address = {Oxford, United Kingdom :},
	edition = {Third edition.},
	url = {http://www.loc.gov/catdir/toc/fy14pdf01/2012474175.html}
}