Halperin, S. W. (1968). Italy and the Vatican at war: A study of their relations from the outbreak of the Franco-Prussian War to the death of Pius IX. Greenwood Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Halperin, Samuel William. Italy and the Vatican at War: A Study of Their Relations from the Outbreak of the Franco-Prussian War to the Death of Pius IX. New York: Greenwood Press, 1968.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Halperin, Samuel William. Italy and the Vatican at War: A Study of Their Relations from the Outbreak of the Franco-Prussian War to the Death of Pius IX. Greenwood Press, 1968.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.