Radio and television
MLA
Radio and Television. Prelinger Archives. Des Moines, IA: Vocational Guidance Films, 1940
APA, 7th edition
(1940). Radio and television. Prelinger Archives. Des Moines, IA: Vocational Guidance Films
Chicago, 17th edition
Radio and television. Prelinger Archives. Des Moines, IA: Vocational Guidance Films, 1940