@book{13735,
	author = {Pollock, Philip H and Pollock, Philip H.},
	title = {An SPSS companion to political anlysis /},
	publisher = {CQ Press,},
	year = {c2009},
	address = {Washington :},
	edition = {3rd ed.},
	note = {Companion text to: Essentials of political analysis / Philip H. Pollock.}
}