Most of the resources listed here concern the history of liberalism, in the original sense.
Ashford, Nigel & Stephen Davies (Eds.). 2011. A Dictionary of Conservative and Libertarian Thought (Routledge Revivals). Routledge.
Conway, David. 1995. Classical Liberalism: The Unvanquished Ideal. LondonMacmillan.
Davies, Stephen. 2013. The History of Individualism. Youtube video.
Davies, Stephen. 2012. British Individualism and Libertarianism the Past and Today. University of Essex Liberty League. Youtube video.
Davies, Stephen. 2006. The Triumph of Classical Liberalism. Institute for Humane Studies. Youtube video.
Davies, Stephen. 2006. The Decline of Classical Liberalism. Institute for Humane Studies. Youtube video.
Ekirch Jr, Arthur. A. 2009 . The Decline of American Liberalism. Independent Institute.
Epstein, Richard. A. 2014. The Classical Liberal Constitution: The Uncertain Quest for Limited Government. Harvard University Press.
Friedman, Milton. 1956 “The Basic Principles of Liberalism”. Lecture at Wabash College.
Friedman, Milton. 2013. “What is Classical Liberalism?”. Free to Choose Network
Gaus, Gerald. & Shane Courtland. 2010. “Liberalism”. Stanford Encyclopedia of Philosophy
Godkin, Edwin Lawrence. 1900. “The Eclipse of Liberalism”. The Nation 71(April 9): 105-106.
Green, David. 1992. The Language of Politics in America: Shaping Political Consciousness from McKinley to Reagan. Ithaca, NY: Cornell University Press.
Greenleaf, W.H. 1983. The British Political Tradition. Vol. 1: The Rise of Collectivism. London: Methuen.
Greenleaf, W.H. 1983. The British Political Tradition. Vol. 2: The Ideological Heritage. London: Methuen.
Hart, David. Webpage. A website devoted to resources on liberalism, especially French liberalism.
Hayek, Friedrich. A. 1982 . “Liberalism”. New Studies in Philosophy, Politics, Economics and the History of Ideas. Routledge.
Hayek, Friedrich. A. 1960. “Why I Am Not a Conservative”. The Constitution of Liberty. University of Chicago Press.
Higgs, Robert. 2009. “The Decline of American Liberalism”. Video, ReasonTV.
Hirst, Francis W. 1931. Gladstone as Financier and Economist. London: Ernest Benn.
Hume, David. 1987. Enquiries Concerning the Human Understanding and Concerning the Principles of Morals. Edited by L. A. Selby-Bigge. Clarendon Press.
Hume, David. 1987.Essays Moral, Political, Literary. Edited by E. F. Miller. Liberty Fund.
Klein, Daniel B. 2014. “The Origin of ‘Liberalism’”. The Atlantic website. February 13.
Klein, Daniel B., with Ryan Daza. 2014. Lost Language, Lost Liberalism. Adam Smith Institute.
Liberty Fund: Library of Economics and Liberty.
McCloskey, Deirdre. N. 2010. The Bourgeois Virtues: Ethics for an Age of Commerce. University of Chicago Press.
McCloskey, Deirdre. N. 2010. Bourgeois Dignity: Why Economics Can’t Explain the Modern World. University of Chicago Press.
Smith, Adam. 1982 . The Theory of Moral Sentiments. Edited by D. D. Raphael and A. L. Macfie. Oxford University Press.
Smith, Adam. 1976 . An Inquiry into the Nature and Causes of the Wealth of Nations. Edited by R. H. Campbell, A. S. Skinner, and W. B. Todd. Oxford University Press.
Smith, Adam. 1978.Lectures on Jurisprudence. Edited by R. L. Meek, D. D. Raphael and P. G. Stein. Oxford University Press.
Smith, Bruce. 1888. Liberty and Liberalism: A Protest against the Growing Tendency toward undue Interference by the State, with Individual Liberty, Private Enterprise and the Rights of Property. Longmans, Green, and Co.
Smith, George H. 2013. The System of Liberty: Themes in the History of Classical Liberalism. Cambridge University Press.
Tucker, Jeffrey and Daniel Klein. 2015. Why We Should Call Ourselves Liberals. January 11. Youtube.
Williamson, Kevin D. 2014. “Whose Liberalism? The curious career of two ideas and one word.” National Review Online. December 29.