Acne vulgaris
George Henry Fox
<cite class="book" style="font-style:normal" id="Reference-Fox-1886">Fox, George Henry (1886)      <i> <a rel="nofollow" class="external text" href="https://books.google.com/books?id=HaMSAAAAYAAJ">Photographic illustrations of skin diseases</a></i> (2<sup>nd</sup> ed.), E.B. Treat Retrieved on 25 September 2010. <small></small></cite>