Não informado. Educators guide to free filmstrips. Educators Progress Service.
Chicago Style (17th ed.) CitationNão informado. Educators Guide to Free Filmstrips. Randolph, Wis: Educators Progress Service.
MLA (8th ed.) CitationNão informado. Educators Guide to Free Filmstrips. Educators Progress Service.
Warning: These citations may not always be 100% accurate.