Não informado. (1955). Educators guide to free tapes, scripts and transcriptions. Educators Progress Service.
Chicago-referens (17:e uppl.)Não informado. Educators Guide to Free Tapes, Scripts and Transcriptions. Randolph, Wis: Educators Progress Service, 1955.
MLA-referens (8:e uppl.)Não informado. Educators Guide to Free Tapes, Scripts and Transcriptions. Educators Progress Service, 1955.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.