@book{81292,
	author = {Lijphart, Arend. and Aitkin, Don.},
	title = {Electoral systems and party systems :},
	publisher = {Oxford University Press,},
	year = {2006.},
	address = {Oxford :},
	url = {http://www.loc.gov/catdir/enhancements/fy0603/93016032-d.html}
}