APA (7th ed.) Zitazioa
Siess, J. A. (2001). The OPL sourcebook: A guide for solo and small libraries. Information Today.
Chicago Style (17th ed.) Zitazioa
Siess, Judith A. The OPL Sourcebook: A Guide for Solo and Small Libraries. Medford, New Jersey: Information Today, 2001.
MLA (9th ed.) Zitazioa
Siess, Judith A. The OPL Sourcebook: A Guide for Solo and Small Libraries. Information Today, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.