@book{52739,
	author = {Nolan, Patrick and Lenski, Gerhard},
	title = {Human societies :},
	publisher = {Paradigm Publishers,},
	year = {c2009},
	address = {Boulder :},
	edition = {11th ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0821/2008026843.html}
}