ebrary, Inc, Gallagher, G. W., & Shelden, R. A. (2012). A political nation: New directions in mid-nineteenth-century American political history. University of Virginia Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)ebrary, Inc, Gary W. Gallagher, و Rachel A. Shelden. A Political Nation: New Directions in Mid-nineteenth-century American Political History. Charlottesville: University of Virginia Press, 2012.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)ebrary, Inc, et al. A Political Nation: New Directions in Mid-nineteenth-century American Political History. University of Virginia Press, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.