توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Catholic Association for International Peace (U.S.). Europe Committee. (1931). Europe and the United States: Elements in their relationship. Catholic Association for International Peace.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Catholic Association for International Peace (U.S.). Europe Committee. Europe and the United States: Elements in Their Relationship. Washington, D.C.: Catholic Association for International Peace, 1931.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Catholic Association for International Peace (U.S.). Europe Committee. Europe and the United States: Elements in Their Relationship. Catholic Association for International Peace, 1931.