Warburton, N. (1999). Philosophy: The basics (Third edition.). Routledge.
Chicago Style aipamenaWarburton, Nigel. Philosophy: The Basics. Third edition. London ; New York: Routledge, 1999.
MLA aipamenaWarburton, Nigel. Philosophy: The Basics. Third edition. Routledge, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.