Não informado. Educators guide to free filmstrips. Educators Progress Service.
Style de citation Chicago (17e éd.)Não informado. Educators Guide to Free Filmstrips. Randolph, Wis: Educators Progress Service.
Style de citation MLA (8e éd.)Não informado. Educators Guide to Free Filmstrips. Educators Progress Service.
Attention : ces citations peuvent ne pas être correctes à 100%.