Não informado. (1957). Higher education and research in the Netherlands. Netherlands Universities Foundation for International Cooperation.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Higher Education and Research in the Netherlands. The Hague, Holanda: Netherlands Universities Foundation for International Cooperation, 1957.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Higher Education and Research in the Netherlands. Netherlands Universities Foundation for International Cooperation, 1957.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.