Não informado. (1977). Adult Literacy & Basic Education. Comission on Adult Basic Education.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Adult Literacy & Basic Education. Auburn, Ala: Comission on Adult Basic Education, 1977.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Adult Literacy & Basic Education. Comission on Adult Basic Education, 1977.
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