Audi, Robert. 2002. Epistemology: A Contemporary Introduction to the Theory of Knowledge. Vol. Routledge contemporary introductions to philosophy. 2nd ed. New York: Routledge.
Ayer, A. J. 1954. Philosophical Essays. London: Macmillan.
Bennett, Jonathan. 2001. ‘Secondary Qualities’. Pp. 74–91 in Learning from six philosophers: Descartes, Spinoza, Leibniz, Locke, Berkeley, Hume. Oxford: Clarendon.
Burke, Michael. 1992. ‘Copper Statues and Pieces of Copper: A Challenge to the Standard Account’. Copper Statues and Pieces of Copper: A Challenge to the Standard Account 52.
Conee, Earl Brink 1950-. 2005. Riddles of Existence [Electronic Resource] : A Guided Tour of Metaphysics.
Descartes, René, and John Cottingham. 1996. Meditations on First Philosophy: With Selections from the Objections and Replies. Vol. Cambridge texts in the history of philosophy. Rev. ed. Cambridge: Cambridge University Press.
Descartes, René, and John Cottingham. 2013. Meditations on First Philosophy: With Selections from the Objections and Replies : A Latin-English Edition. Cambridge, England: Cambridge University Press.
Earl Conee , and Theodore Sider. 2014. Riddles of Existence : A Guided Tour of Metaphysics: New Edition. OUP Oxford.
Frankfurt, Harry G. 1969. ‘Alternate Possibilities and Moral Responsibility’. The Journal of Philosophy 66(23). doi: 10.2307/2023833.
Jack, Smart. n.d. ‘The Mind/Brain Identity Theory’.
Locke, John, and R. S. Woolhouse. 1997. An Essay Concerning Human Understanding. Vol. Penguin classics. London: Penguin.
Nagel, Thomas. 1974. ‘What Is It Like to Be a Bat?’ The Philosophical Review 83(4). doi: 10.2307/2183914.
Shafer-Landau, Russ. 2013a. Ethical Theory: An Anthology. Vol. 17. 2nd ed. Chichester, West Sussex: Wiley-Blackwell.
Shafer-Landau, Russ. 2013b. Ethical Theory: An Anthology. Vol. 17. 2nd ed. Chichester, West Sussex: Wiley-Blackwell.
Shafer-Landau, Russ. 2013c. Ethical Theory: An Anthology. Vol. 17. 2nd ed. Chichester, West Sussex: Wiley-Blackwell.
Shafer-Landau, Russ. 2013d. Ethical Theory: An Anthology. Vol. 17. 2nd ed. Chichester, West Sussex: Wiley-Blackwell.
Shafer-Landau, Russ. 2013e. Ethical Theory: An Anthology. Vol. 17. 2nd ed. Chichester, West Sussex: Wiley-Blackwell.
