(1999). Planning in Germany: Introduction to system, history and research ; outline of Ruhr region, Frankfort, Berlin ; [held in the Ruhr region, 17th to 20th of September 99, Gelsenkirchen].
Chicago-Zitierstil (17. Ausg.)Planning in Germany: Introduction to System, History and Research ; Outline of Ruhr Region, Frankfort, Berlin ; [held in the Ruhr Region, 17th to 20th of September 99, Gelsenkirchen]. Germering, 1999.
MLA-Zitierstil (9. Ausg.)Planning in Germany: Introduction to System, History and Research ; Outline of Ruhr Region, Frankfort, Berlin ; [held in the Ruhr Region, 17th to 20th of September 99, Gelsenkirchen]. 1999.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.