Amariles, David Restrepo (2008). Legality and Legitimacy: The Political Philosophy of Popular Sovereignty in the New Latin American Constitutions, Master in Legal Theory/Formation Doctorale en Théorie du Droit Katholieke Universiteit Brussel/Académie Universitaire de Louvain (FUSL) EUROPEAN ACADEMY OF LEGAL THEORY.
Ahmad, Irfan (2011). «Immanent critique and Islam: Anthropological reflections», Journal of Anthropological Theory, 11(1), p. 107-132.
Aquinas, St Thomas (1949). On Kingship to the King of Cyprus, United States, Pennsylvania State University.
________________ (2002). Aquinas: Political Writings, Edit and translate by R.W. DYSON, United Kingdo, Cambridge University Press.
________________ (2013). Summa Theologica, Unites states, Cosimo inc Volume 3 (Part II).
________________ (2014). The Summa Theologica: Complete Edition, translate by The Fathers of the English Dominican Province, London, Catholic Way Publishing.
Beetham, David (2013). The Legitimation of Power, Basingstoke, Palgrave.
Black, Antony (2011). The History of Islamic Political, United Kingdom, Edinburgh university press.
Coicaud, Jean-Marc (2002). Legitimacy and Politics: A Contribution to the Study of Political Right and Political Responsibility, UK, Cambridge University.
Groff, Peter S (2007). Islamic Philosophy A–Z, Scotland, Edinburgh University Press.
Habermas, Jürgen (1979). Communication and the Evolution of Society, translated by Thomas McCarthy, Boston, Beacon Press.
Jianping, LIU (2015). “The connotation of legitimacy and the historical evolution of Western political”, at International Conference on Social Science and Technology Education, part 1, Amsterdam, Atlantis Press, p. 460-462.
Kenny, Anthony (2006). A Brief History of Western Philosophy, United Kingdom. Blackwell publishing.
Nbete, Alubabari Desmond (2012).“The Social Contract Theory: A Model for Reconstructing a True Nigerian Nation-State International Journal of Humanities and Social Science, vol2, p. 267-278.
White, Michael (2012). Political Philosophy: An Historical Introduction, USA, Oxford University Press.