Não informado. (1991). Economic & Financial Computing. European Economics and Financial Centre.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Economic & Financial Computing. London: European Economics and Financial Centre, 1991.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Economic & Financial Computing. European Economics and Financial Centre, 1991.
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