Hope, A., & Nagler, J. (1991). Guide to German Historical Sources in North American Libraries and Archives: Anne Hope, Jörg Nagler. German Historical Institute.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hope, Anne, و Jörg Nagler. Guide to German Historical Sources in North American Libraries and Archives: Anne Hope, Jörg Nagler. Washington, D.C.: German Historical Institute, 1991.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Hope, Anne, و Jörg Nagler. Guide to German Historical Sources in North American Libraries and Archives: Anne Hope, Jörg Nagler. German Historical Institute, 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.