Não informado. (1979). Europe. Delegation of the Commission of the European Communities.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Europe. Washington: Delegation of the Commission of the European Communities, 1979.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Europe. Delegation of the Commission of the European Communities, 1979.
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