1.http://en.wikipedia.org
2.Science for all Americans, chapter 7 Human society. http://www.project2061.org
3.Noah Elkin, Internet Access Under African Skies. eMarketer Daily Issue 162
（2002）. http://www.emarketer.com/news/article.php
4.http://TermPapers-TermPapers.com
5.International Commission on Peace and Food, Uncommon Opportunities: An. Agenda for Peace and Equitable Development, Zed Books, UK, 1994,p158
6.Herbert Spencer. Sociological Theorists Page.
7.Joseph Kary, Contract Law and the Social Contract: What Legal History Can Teach Us About the Political Theory of Hobbes and Locke. 31Ottawa Law Review 73,Jan. 2000
8.Thornton, Stephen. Karl Popper. Stanford Encyclopedia of Philosophy. 2007
9.The Demarcation of Science and Religion. The History of Science and Religion in the Western Tradition （Garland Publishing）. Discovery Institute, 2000
10.Weiner B. Interpersonal and intrapersonal theories of motivation from an attributional perspective. Educational Psychology Review, 2000
11.Jonathan Benth. All Animal Liberation and Rights. Anthropology Today, 2007
12.Microsoft Encarta 2006.1993-2005Microsoft Corporation.
13.Hegel. Philosophy of Right. 1820
14.Jonathan Frankel. Prophecy and Politics: Socialism, Nationalism, and the Russian Jews. Cambridge University Press, 1981
15.Williman H. Dray Philosophical Analysis and History: The Historical Individual. Rainbow-Bridge Book Co., 1966
16.Weber, Maximillan. Theory of Social and Economic Organization. Chapter: “The Nature of Charismatic Authority and its Routinization” translated by A. R. Anderson and Talcot Parsons, 1947.