Library of Congress. Federal Research Division & Curtis, G. E. (1998). Russia: A country study. Federal Research Division, Library of Congress.
Lua i Stíl Chicago (17ú heag.)Library of Congress. Federal Research Division agus Glenn E. Curtis. Russia: A Country Study. Washington, DC: Federal Research Division, Library of Congress, 1998.
Lua MLA (8ú heag.)Library of Congress. Federal Research Division agus Glenn E. Curtis. Russia: A Country Study. Federal Research Division, Library of Congress, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.