Purcell, G. R. (1984). Reference sources in library and information services: A guide to the literature. ABC-Clio Information Services.
Chicago-Zitierstil (17. Ausg.)Purcell, Gary R. Reference Sources in Library and Information Services: A Guide to the Literature. Santa Barbara, Calif. [u.a.]: ABC-Clio Information Services, 1984.
MLA-Zitierstil (9. Ausg.)Purcell, Gary R. Reference Sources in Library and Information Services: A Guide to the Literature. ABC-Clio Information Services, 1984.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.