3The Corporation for National and Community Service, Volunteering in America Research Highlights, July 2009.
4Dan Levy, "Foreclosure Fillings in U. S. Reach Record 1.5 Million ," July 16, 2009, from http://www. boomberg, com/apps/news,2009年8月18日.
5U. S. Profile:Volunteering in America, http://www, volunteeringinameriea, gov/, 2009年8月13日.
6Richard Nixon: Proclamation 4288: National Volunteer Week, 1974, April 20, 1974, John T. Woolley and Gerhard Peters, The American Presidency Project [online], Santa Barbara, CA: University of California (hosted). Gerhard Peters database. From http://www, presidency, ucsb. edu/, 2009年8月13日.
7The American Presidency Project [online],Santa Barbara, CA.. University of California (hosted) Gerhard Peters database, http://www, presidency. ucsb. edu/.
8Barack Obama, "Proclamation: National Volunteer Week, 2009, "April 21, 2009, Office of the Press Secretary, The White House, from http://www, whitehouse, gov/the press_office/, 2009年8月13日.
