Não informado. (1948). Language Learning. Research Club in Language Learning.
Chicagoスタイル(17版)引用形式Não informado. Language Learning. Ann Arbor, Mich: Research Club in Language Learning, 1948.
MLA(8版)引用形式Não informado. Language Learning. Research Club in Language Learning, 1948.
警告: この引用は必ずしも正確ではありません.