Howitt, Dennis. Introduction to research methods in psychology / Dennis Howitt, D uncan Cramer. - 3rd ed. - Harlow, England ; New York : Prentice Hall, 2011. - xxii, 449 p. ; 27 cm. Includes bibliographical references and index. ISBN: 9780273726074 LCCN: 2010-036374 Subjects--Topical Terms: Psychology-- Research-- Methodology. Dewey Class. No.: 150.72