8James Douglas,“ Political Theories of Nonprofit Organization”, in Walter W. Powell ed. ,The Nonprofit Sector, Yale University Press, 1987: 43.
9Merle Curti,“ Tradition and Innovation in American Philanthropy”, Proceedings of the American Philosophical Society, Vol.105, No. 2, April, 1961:146 -156.
10Irvin G. Wyllie,“The Search for an American Law of Charity, 1776 - 1884”, The Mississippi Valley Historical Review,Vol. 46, No. 2 (Sept. , 1959), pp. 203 -221.
