APA-čujuhus (7. p.)
Siess, J. A. (2001). The OPL sourcebook: A guide for solo and small libraries. Information Today.
Chicago-čujuhus (17. p.)
Siess, Judith A. The OPL Sourcebook: A Guide for Solo and Small Libraries. Medford, New Jersey: Information Today, 2001.
MLA-čujuhus (9. p.)
Siess, Judith A. The OPL Sourcebook: A Guide for Solo and Small Libraries. Information Today, 2001.
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