Logo von <a href="https://de.wikipedia.org/wiki/WPP" class="extiw" title="de:WPP">WPP</a>
Unknown author<span style="display: none;">Unknown author</span>
Own work  using: <a rel="nofollow" class="external free" href="https://www.wpp.com/assets/img/WPP-logo.svg">https://www.wpp.com/assets/img/WPP-logo.svg</a>