Horn, F. W., & Zimmermann, R. (2009). Einführung.
Chicago Style (17th ed.) CitationHorn, Friedrich Wilhelm, and Ruben Zimmermann. Einführung. 2009.
MLA (9th ed.) CitationHorn, Friedrich Wilhelm, and Ruben Zimmermann. Einführung. 2009.
Warning: These citations may not always be 100% accurate.