Organisation for Economic Co-operation and Development. (1977). Germany. Organisation for Economic Co-operation and Development ; sold by OECD Publications Center].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Organisation for Economic Co-operation and Development. Germany. Paris : [Washington, D.C.: Organisation for Economic Co-operation and Development ; sold by OECD Publications Center], 1977.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Organisation for Economic Co-operation and Development. Germany. Organisation for Economic Co-operation and Development ; sold by OECD Publications Center], 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.