Quantitative and qualitative methods in psychotherapy research / edited by Wolfgang Lutz and Sarah Knox. - Hove, East Sussex ; New York, NY : Routledge, 2014. - xxiii, 448 p. ; 24 cm. - Explorations in mental health series. . Includes bibliographical references and index ISBN: 9780415820707 Subjects--Topical Terms: Evidence-based psychotherapy.Psychotherapy--Research.