Burkhardt, H. (2001). Handbook of Metaphysics and Ontology: Ed. Hans Burkhardt ; Barry Smith ([Students ed.].). Philosophia-Verl..
Lua i Stíl Chicago (17ú heag.)Burkhardt, Hans. Handbook of Metaphysics and Ontology: Ed. Hans Burkhardt ; Barry Smith. [Students ed.]. München [u.a.]: Philosophia-Verl., 2001.
Lua MLA (8ú heag.)Burkhardt, Hans. Handbook of Metaphysics and Ontology: Ed. Hans Burkhardt ; Barry Smith. [Students ed.]. Philosophia-Verl., 2001.
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