<div class="fn value">
<span lang="en">Anonymous</span> (<a href="https://en.wikipedia.org/wiki/en:Old_Believers" class="extiw" title="w:en:Old Believers"><span title="Eastern Orthodox Christians who resist reforms of Nikon in 1652–1666, religious movement in Imperial Russia">Old Believers</span></a>, Volga Region)<span style="display:none">Unknown author</span></div>
Dorota Folga-Januszewska (2005). <i>Muzeum Narodowe w Warszawie : arcydzieła malarstwa</i>. Arkady. <a href="//commons.wikimedia.org/wiki/Special:BookSources/83-21343-31-7" title="Special:BookSources/83-21343-31-7">ISBN 83-21343-31-7</a>