and Intrinsic Value, Princeton University Press. Ardales, V.B. (1987). "Introductory Text to Philosophy", Quezon City: Greatbooks Trading Inc. Brink, David O. (1989). Moral Realism and the Foundations of Ethics, Cambridge University Press. Deigh, John (2013). "Ethics in the Analytic Tradition" in The Oxford Handbook of the History of Ethics ed. Roger Crisp, Oxford University Press Hare, R.M (1997). Sorting Out Ethics, Oxford University Press. Huemer, Michael (2005). Ethical Intuitionism, Palgrave Macmillan. Louden, Robert B (1996). "Toward a Genealogy of 'Deontology'". Journal of the History of Philosophy 34:4. Johns Hopkins University Press. Mackie, J.L. (1977). Ethics: Inventing Right and Wrong. Penguin. Moore, G.E. (1993). Principia Ethica, revised edition, Cambridge University Press. Prichard, H.A. (1912). "Does Moral Philosophy Rest on a Mistake?" Mind, N.S., Vol. 21. Ross, W.D. (1930). The Right and the Good, Oxford: Clarendon Press. Shafer-Landau, Russ and Terence Cuneo, editors (2012). Foundations of Ethics: An Anthology. Blackwell Publishing. Sidgwick, Henry (1907). The Methods of Ethics, Macmillan and Company, Ltd. Sidgwick, Henry (1931). Outlines of the History of Ethics 6th edition (enlarged), Macmillan and Company, Ltd. Stratton-Lake, Philip (2013). "Rational Intuitionism" in The Oxford Handbook of the History of Ethics ed. Roger Crisp, Oxford University Press. Stratton-Lake, Philip (2014). "Intuitionism in Ethics" in Stanford Encyclopedia of Philosophy, ed. E. Zalta. Sinnott-Armstrong, Walter (2006b). Moral Skepticisms, Oxford University Press. Williams, Bernard (2011). Ethics and the Limits of Philosophy, Routledge Classics External links Intuitionism in Ethics at Stanford Encyclopedia of Philosophy A Priorism in Moral Epistemology at Stanford Encyclopedia of Philosophy Ethical Intuitionism , a contemporary defense of the theory by Michael Huemer. Papers defending intuitionism – by Michael Huemer. Meta-ethics