^Carter Dougherty (9 أبريل 2005). "Consultant has politician's ears". International Herald Tribute. مؤرشف من الأصل في 2020-01-26. To ask whether Roland Berger, Germany's most important management consultant, has a political home misses the point entirely. The politicians all seem to want him in their homes - that's the point.{{استشهاد ويب}}: استعمال الخط المائل أو الغليظ غير مسموح: |ناشر= (مساعدة)
