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).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKeilholz-Rühle, Nikky, Stephan Nobbe, और Uwe Rau. "Language Policies of the Goethe-Institut: Nikky Keilholz-Rühle. Stephan Nobbe." Globalization and the Future of German : With a Select Bibliography.(2004) .
एमएलए (8वां संस्करण) प्रशस्ति पत्रKeilholz-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), .
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