Purcell, G. R., & Schlachter, G. A. (1984). Reference sources in library and information services: A guide to the literature. ABC-Clio Information services.
Čikaški stil citiranja (17. izdanje)Purcell, Gary R., i Gail Ann Schlachter. Reference Sources in Library and Information Services: A Guide to the Literature. Santa Barbara, Calif: ABC-Clio Information services, 1984.
MLA način citiranja (9. izdanje)Purcell, Gary R., i Gail Ann Schlachter. Reference Sources in Library and Information Services: A Guide to the Literature. ABC-Clio Information services, 1984.
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