Neuman, W. Lawrence Social research methods : quantitative approaches / W. Lawrence Neuman - 7th ed. - Boston : Pearson, c2011. - viii, 631 p. : ill. ; 25 cm. ISBN: 9780205786831 LCCN: Subjects--Topical Terms: Social sciencesResearchMethodology LC Class. No.: H62 / .N38 2011