Twentieth Century Fund & Dewhurst, J. F. (1961). Europe's needs and resources: Trends, and prospects in eighteen countries. [Publisher not identified].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Twentieth Century Fund و J. Frederic Dewhurst. Europe's Needs and Resources: Trends, and Prospects in Eighteen Countries. New York: [Publisher not identified], 1961.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Twentieth Century Fund و J. Frederic Dewhurst. Europe's Needs and Resources: Trends, and Prospects in Eighteen Countries. [Publisher not identified], 1961.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.