Não informado. Educators guide to free filmstrips. Educators Progress Service.
Cita Chicago Style (17a ed.)Não informado. Educators Guide to Free Filmstrips. Randolph, Wis: Educators Progress Service.
Cita MLA (8a ed.)Não informado. Educators Guide to Free Filmstrips. Educators Progress Service.
Precaución: Estas citas no son 100% exactas.