Não informado. (1922). Educational screen. Society for Visual Education.
Chicagoスタイル(17版)引用形式Não informado. Educational Screen. Chicago, Ill: Society for Visual Education, 1922.
MLA(8版)引用形式Não informado. Educational Screen. Society for Visual Education, 1922.
警告: この引用は必ずしも正確ではありません.