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5Philanthropy UK.Charitable giving in the UK and USA.http://www.philanthropyuk.org.
6Giving USA.U.S.Charitable Giving estimated to be $307.65 billion in 2008.http://www.givingusa.org,2009.
7White,Arthur H.Patterns of Giving.Philanthropic Giving:Studies in Varieties and Goals.Richard Magat.London:Oxford University Press,1989.