Não informado. (1956). Audiovisual instruction. National Education Association, Department of Audio Visual Instruction.
Lua i Stíl Chicago (17ú heag.)Não informado. Audiovisual Instruction. Washington: National Education Association, Department of Audio Visual Instruction, 1956.
Lua MLA (8ú heag.)Não informado. Audiovisual Instruction. National Education Association, Department of Audio Visual Instruction, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.