Toseland, Ronald W. An introduction to group work practice / Ronald W. Toseland, Robert F. Rivas. - 6th ed. - Boston : Pearson/Allyn and Bacon, c2009. - xix, 537 p. : col. ill. ; 26 cm. Includes bibliographical references (p. 485-521) and indexes. ISBN: 0205593828 9780205593828 Subjects--Topical Terms: Social group work