This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
DescriptionZotero and OpenURL referrer example showing available references.png
An example of both Zotero and OpenURL referrer in action on a Wikipedia article that uses citation templates with embedded COinS tags. In this example, Zotero is displaying the references it can retrieve. The OpenURL referrer is responsible for the Find in a library links.
This screenshot either does not contain copyright-eligible parts or visuals of copyrighted software, or the author has released it under a free license (which should be indicated beneath this notice), and as such follows the licensing guidelines for screenshots of Wikimedia Commons. You may use it freely according to its particular license.
Free software license:
GNU Affero General Public LicenseAGPLhttp://www.gnu.org/licenses/agpl.htmltrue
Note: if the screenshot shows any work that is not a direct result of the program code itself, such as a text or graphics that are not part of the program, the license for that work must be indicated separately.