Unknown author<span style="display: none;">Unknown author</span>
2. <a rel="nofollow" class="external text" href="https://www.nga.gov/collection/art-object-page.44.html">National Gallery of Art online catalogue</a>. 1. <a rel="nofollow" class="external text" href="http://www.pintoresfamosos.cl/obras/luini.htm">pintoresfamosos.cl</a>