Spaulding, H. F. (1952). Audio-visual research: Report to the 1952 audio-visual workshop. National Council of Churches.
Lua i Stíl Chicago (17ú heag.)Spaulding, Helen F. Audio-visual Research: Report to the 1952 Audio-visual Workshop. Chicago: National Council of Churches, 1952.
Lua MLA (8ú heag.)Spaulding, Helen F. Audio-visual Research: Report to the 1952 Audio-visual Workshop. National Council of Churches, 1952.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.