Annual Meeting of the Association of German Economic Research Institutes (Berlin) : 2009.04.23 & Wey, C. (2009). Twenty years of economic reconstruction in East Germany: Ed. by Christian Wey and Klaus F. Zimmermann. Duncker & Humblot.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Annual Meeting of the Association of German Economic Research Institutes (Berlin) : 2009.04.23 و Christian Wey. Twenty Years of Economic Reconstruction in East Germany: Ed. by Christian Wey and Klaus F. Zimmermann. Berlin: Duncker & Humblot, 2009.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Annual Meeting of the Association of German Economic Research Institutes (Berlin) : 2009.04.23 و Christian Wey. Twenty Years of Economic Reconstruction in East Germany: Ed. by Christian Wey and Klaus F. Zimmermann. Duncker & Humblot, 2009.