Library of Congress. (1979). National preservation report. Library of Congress.
Lua i Stíl Chicago (17ú heag.)Library of Congress. National Preservation Report. [Washington, D.C.]: Library of Congress, 1979.
Lua MLA (8ú heag.)Library of Congress. National Preservation Report. Library of Congress, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.