Peter Lenk: Karriereleiter. 2007. Bundesallee Ecke Spichernstraße, <a href="//commons.wikimedia.org/wiki/Berlin-Wilmersdorf" title="Berlin-Wilmersdorf">Berlin-Wilmersdorf</a>
Axel Mauruszat
CC BY 2.0 de
<span class="int-own-work" lang="en">Own work</span>