Keilholz-Rühle, N., Nobbe, S., & Rau, U. Language policies of the Goethe-Institut: Nikky Keilholz-Rühle. Stephan Nobbe. Globalization and the future of German : with a select bibliography.(2004).
Lua i Stíl Chicago (17ú heag.)Keilholz-Rühle, Nikky, Stephan Nobbe, agus Uwe Rau. "Language Policies of the Goethe-Institut: Nikky Keilholz-Rühle. Stephan Nobbe." Globalization and the Future of German : With a Select Bibliography.(2004) .
Lua MLA (8ú heag.)Keilholz-Rühle, Nikky, et al. "Language Policies of the Goethe-Institut: Nikky Keilholz-Rühle. Stephan Nobbe." Globalization and the Future of German : With a Select Bibliography.(2004), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.