Toseland, Ronald W. An introduction to group work practice / Ronald W. Toseland, Robert F. Rivas. - 6th ed. - Boston : Pearson, 2009. - xix, 537 p : ill. Includes bibliographical references and index. ISBN: 9780205507085 : Subjects--Topical Terms: Social group work. LC Class. No.: HV45 / .T68