Bumpus Bernard. (1980). Seventy years of international broadcasting. Unesco.
Lua i Stíl Chicago (17ú heag.)Bumpus Bernard. Seventy Years of International Broadcasting. Paris: Unesco, 1980.
Lua MLA (9ú heag.)Bumpus Bernard. Seventy Years of International Broadcasting. Unesco, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.