Rubin, Allen. Research methods for social work / Allen Rubin, Earl R. Babbie. - 7th ed. - Belmont, CA : Brooks/Cole, Cengage Learning, c2011. - xvii, 653 p. : ill. ; 26 cm. Includes bibliographical references (p. 631-642) and index. ISBN: 9780495811718 (hbk.) Subjects--Topical Terms: Social service--Research--Methodology. Dewey Class. No.: 361.0072 / RUB 2011