- Variation in German: A Critical Approach to German Sociolinguistics
- Language and Migration in a Multilingual Metropolis: Berlin Lives
- Language and German Disunity: A Sociolinguistic History of East and West in Germany, 1945-2000
- Language, Discourse and Identity in Central Europe: The German Language in a Multilingual Space
- Language and Social Change in Central Europe: Discourses on Policy, Identity and the German Language







