{{cite web | url=http://www.europeana.eu/resolve/record/08604/2DCA64031E7476932B189DFD1A047A05C62E2DC6|title=Von Werra|accessdate=2013-05-20 |publisher=Europeana}}

<ref>{{cite web | url=http://www.europeana.eu/resolve/record/08604/2DCA64031E7476932B189DFD1A047A05C62E2DC6|title=Von Werra|accessdate=2013-05-20 |publisher=Europeana}}</ref>