Bayer, T. I., & Cassirer, E. (2001). Cassirer's Metaphysics of symbolic forms: A philosophical commentary. Yale University Press.
Lua i Stíl Chicago (17ú heag.)Bayer, Thora Ilin, agus Ernst Cassirer. Cassirer's Metaphysics of Symbolic Forms: A Philosophical Commentary. New Haven: Yale University Press, 2001.
Lua MLA (9ú heag.)Bayer, Thora Ilin, agus Ernst Cassirer. Cassirer's Metaphysics of Symbolic Forms: A Philosophical Commentary. Yale University Press, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.