APA-referens (7:e uppl.)

Não informado. (1948). Language Learning. Research Club in Language Learning.

Chicago-referens (17:e uppl.)

Não informado. Language Learning. Ann Arbor, Mich: Research Club in Language Learning, 1948.

MLA-referens (8:e uppl.)

Não informado. Language Learning. Research Club in Language Learning, 1948.

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