1. BB: Wittgenstein, Ludwig. 1958. The Blue and Brown Books. Oxford: Blackwell.
2. CPJ: Kant, Immanuel. 2000. Critique of the Power of Judgment. Ed. Paul Guyer and Trans. Paul Guyer, and Eric Matthews. Cambridge: Cambridge University Press.
3. CPR: ———. 1998. Critique of Pure Reason. Ed. and trans. Paul Guyer, and Allen Wood. Cambridge: Cambridge University Press.
4. M: Wittgenstein, Ludwig. 2016. In Wittgenstein: Lectures, Cambridge 1930−1933 from the Notes of G. E. Moore, ed. David Stern, Brian Rogers, and Gabriel Citron. Cambridge: Cambridge University Press.
5. NB: ———. 1961. Notebooks 1914–1916. Ed. G.H. von Wright, and G.E.M. Anscombe and trans. G.E.M. Anscombe. Oxford: Blackwell.