Não informado. (1959). Bulletin from the European Community. European Community Information Service.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin from the European Community. Washington: European Community Information Service, 1959.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin from the European Community. European Community Information Service, 1959.
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