{{cite web | url=http://www.europeana.eu/resolve/record/08547/F9680BF600CD52FA18950424A58AD375161E8C3C|title=Bildnis Carl Maria von Weber|author=Mayer, Carl (Stahlstecher)|accessdate=2013-05-20 |publisher=Europeana}}

<ref>{{cite web | url=http://www.europeana.eu/resolve/record/08547/F9680BF600CD52FA18950424A58AD375161E8C3C|title=Bildnis Carl Maria von Weber|author=Mayer, Carl (Stahlstecher)|accessdate=2013-05-20 |publisher=Europeana}}</ref>