Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Carl Maria von Weber:

This text has been unreferenced on Wikipedia for a very long time. If you can't find a source, be bold and remove it!

"

As a sobering side effect, Weber started to keep a diary to list his expenses and correspondence, and make occasional comments on special events.[citation needed]