Não informado. (1952). Problems of Comunism. U.S. Information Agency.
Lua i Stíl Chicago (17ú heag.)Não informado. Problems of Comunism. Washington: U.S. Information Agency, 1952.
Lua MLA (8ú heag.)Não informado. Problems of Comunism. U.S. Information Agency, 1952.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.