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 Novosibirsk:

"

The best-known trees native to Novosibirsk are birch, pine, and aspen. Some mountain ash, hawthorn, spruce, and fir are present as well. European species of apple, ash, elm, linden, and oak have been successfully introduced.[citation needed]