Lua APA (7ú heag.)

Library of Congress & Subjet Cataloging Division. (2007). Subject Headings (30th. ed.). The National Bibliographic Service.

Lua i Stíl Chicago (17ú heag.)

Library of Congress agus Subjet Cataloging Division. Subject Headings. 30th. ed. Washington: The National Bibliographic Service, 2007.

Lua MLA (9ú heag.)

Library of Congress agus Subjet Cataloging Division. Subject Headings. 30th. ed. The National Bibliographic Service, 2007.

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