ebrary, Inc, Engs, R. F., Brooks, C. M., & Evans, J. S. (2007). Their patriotic duty: The Civil War letters of the Evans family of Brown County, Ohio. Fordham University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)ebrary, Inc, Robert Francis Engs, Corey M. Brooks, و Joseph S. Evans. Their Patriotic Duty: The Civil War Letters of the Evans Family of Brown County, Ohio. New York: Fordham University Press, 2007.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)ebrary, Inc, et al. Their Patriotic Duty: The Civil War Letters of the Evans Family of Brown County, Ohio. Fordham University Press, 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.