Não informado. (1957). Higher education and research in the Netherlands. Netherlands Universities Foundation for International Cooperation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Higher Education and Research in the Netherlands. The Hague, Holanda: Netherlands Universities Foundation for International Cooperation, 1957.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Higher Education and Research in the Netherlands. Netherlands Universities Foundation for International Cooperation, 1957.
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