@book{37349,
	author = {Box-Steffensmeier, Janet M.},
	title = {The Oxford handbook of political methodology},
	publisher = {Oxford University Press},
	year = {2008},
	series = {The Oxford handbooks of political science},
	address = {Oxford (Oxfordshire, Inglaterra)},
	url = {http://www.loc.gov/catdir/enhancements/fy0907/2008024395-t.html}
}