Não informado. (1957). Higher education and research in the Netherlands. Netherlands Universities Foundation for International Cooperation.
Citação do estilo Chicago (17ª ed.)Não informado. Higher Education and Research in the Netherlands. The Hague, Holanda: Netherlands Universities Foundation for International Cooperation, 1957.
Citação MLA (8ª ed.)Não informado. Higher Education and Research in the Netherlands. Netherlands Universities Foundation for International Cooperation, 1957.
警告：这些引文格式不一定是100％准确.