Não informado. (1956). Educational Screen and Audio-visual Guide. Educational Screen.
Chicagoスタイル(17版)引用形式Não informado. Educational Screen and Audio-visual Guide. Chicago, Ill: Educational Screen, 1956.
MLA(8版)引用形式Não informado. Educational Screen and Audio-visual Guide. Educational Screen, 1956.
警告: この引用は必ずしも正確ではありません.