"History." Philanthropy Roundtable. philanthropyroundtable.org. 2006. "Philanthropy Roundtable". Archived from the original on 2007-09-28. Retrieved 2007-08-25.
web.archive.org
"History." Philanthropy Roundtable. philanthropyroundtable.org. 2006. "Philanthropy Roundtable". Archived from the original on 2007-09-28. Retrieved 2007-08-25.