Pollock, P. H., & Pollock, P. H. (2009). An SPSS companion to political anlysis (3rd ed.). CQ Press.
Chicago (17e ed.) BronvermeldingPollock, Philip H., en Philip H. Pollock. An SPSS Companion to Political Anlysis. 3rd ed. Washington: CQ Press, 2009.
MLA (8e ed.) BronvermeldingPollock, Philip H., en Philip H. Pollock. An SPSS Companion to Political Anlysis. 3rd ed. CQ Press, 2009.
Let op: Deze citaties zijn niet altijd 100% accuraat.