Library of Congress & Subjet Cataloging Division. (2007). Library of Congress Subject Headings (30th ed.). The National Bibliographic Service.
Chicago-čujuhus (17. p.)Library of Congress juo Subjet Cataloging Division. Library of Congress Subject Headings. 30th ed. Washington: The National Bibliographic Service, 2007.
MLA-čujuhus (9. p.)Library of Congress juo Subjet Cataloging Division. Library of Congress Subject Headings. 30th ed. The National Bibliographic Service, 2007.
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