Hay, C. (2008). The theory of knowledge: A coursebook. Luttherworth Press.
Chicago Style (17th ed.) ZitazioaHay, Clare. The Theory of Knowledge: A Coursebook. Cambridge, U.K.: Luttherworth Press, 2008.
MLA (9th ed.) ZitazioaHay, Clare. The Theory of Knowledge: A Coursebook. Luttherworth Press, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.