Used on German Wikipedia for articles missing sources.
<a href="//commons.wikimedia.org/wiki/User:Hk_kng" title="User:Hk kng">Hk kng</a>, <a href="//commons.wikimedia.org/wiki/File:Qsicon_Quelle.png" title="File:Qsicon Quelle.png">Image:Qsicon_Quelle.png</a> is by <a href="//commons.wikimedia.org/wiki/User:San_Jose" title="User:San Jose">User:San Jose</a>, <a href="//commons.wikimedia.org/wiki/File:QS_icon_template.svg" class="mw-redirect" title="File:QS icon template.svg">Image:QS icon template.svg</a> is by <a href="//commons.wikimedia.org/wiki/User:JesperZedlitz" title="User:JesperZedlitz">User:JesperZedlitz</a>
CC BY 3.0
based on <a href="//commons.wikimedia.org/wiki/File:Qsicon_Quelle.png" title="File:Qsicon Quelle.png">Image:Qsicon_Quelle.png</a> and <a href="//commons.wikimedia.org/wiki/File:QS_icon_template.svg" class="mw-redirect" title="File:QS icon template.svg">Image:QS icon template.svg</a>