Reference and information services : an introduction / Richard E. Bopp and Linda C. Smith, editors. - 4th ed. - Santa Barbara, Calif. : Libraries Unlimited, c2011. - xxiii, 743 p. : ill. ; 26 cm. - Library and information science text series . Includes bibliographical references and indexes. ISBN: 9781591583653 (hardcover : acidfree paper) 9781591583745 (pbk. : acidfree paper) 9781598848175 (ebk.) LCCN: 2011008550 Subjects--Topical Terms: Reference services (Libraries)Information services. LC Class. No.: Z711 / .R443 2011 Dewey Class. No.: 025.5/2