Gravetter, Frederick J. Research methods for the behavioral sciences / Frederick J Gravetter, Lori-Ann B. Forzano. - 3rd ed. - Australia ; United States : Wadsworth Cengage Learning, c2009. - xxi, 614 p. : ill. ; 24 cm. ISBN: 9780495509783 (alk. paper) 0495509787 (alk. paper) LCCN: 2007942065 Subjects--Topical Terms: Psychology--Research--Methodology.Social sciences--Research--Methodology. LC Class. No.: BF76.5 / .G73 2009 Dewey Class. No.: 150.72 GRA