Não informado. (1952). Special report. National Research Council.
Lua i Stíl Chicago (17ú heag.)Não informado. Special Report. Washington: National Research Council, 1952.
Lua MLA (8ú heag.)Não informado. Special Report. National Research Council, 1952.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.