Department of Labor of the United States investigation into <a href="//commons.wikimedia.org/wiki/Landmark_Education" class="mw-redirect" title="Landmark Education">Landmark Education</a>'s labor practices.  2003-2006.  <a href="//commons.wikimedia.org/wiki/Colorado" title="Colorado">Colorado</a>
Department of Labor of the United States
2006-06-26
U.S. Department of Labor, Landmark Education investigation file, 2004-167-04517.