Andrew Robertson. Encyclopedia of U.S. Political History. SAGE.
Lua i Stíl Chicago (17ú heag.)Andrew Robertson. Encyclopedia of U.S. Political History. SAGE.
Lua MLA (8ú heag.)Andrew Robertson. Encyclopedia of U.S. Political History. SAGE.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.